willow buds (sprout/green) 15 Mar 9 Mar 15 Mar 17 Mar 27 -8.0
(Salix alba vitellina)
Euro. hazelnut (FF/Pollen) 13 Mar 19 Mar 21 Mar 21 Mar 30 -5.5
(Corylus avellana)
skunk cabbage (pollen/PB) 13(Mar 18)Mar 25(Mar 31)Apr 2 -4.5
(Symplocarpus foetidus)
silver maple 16 Mar 18 Mar 26(Mar 23)Apr 6 -11.0
(Acer saccharinum)
Amer.hazelnut (FF/Pollen) 13 Mar 19 Mar 28 Mar 22 Apr 7 -12.5
(Corylus americana)
coltsfoot 22 Mar Mar 28(Apr 11)Apr 16 -8.5
(Tussilago farfara) 16/24
snowdrop (garden) 19 Mar 12 Mar 31(Apr 1) Apr 12 -15.0
(Galanthus nivalis)
beaked hazel (FF/Pollen) 9(Mar 21)Mar 31 Mar 28 Apr 12 -12.5
(Corylus cornuta)
garden crocus (purple) 19(Mar 28)Apr 5 Apr 12 Apr 15 -5.5
(Crocus vernus)
American elm (FF/Pollen) 18 Mar 24 Apr 6 (Apr 3) Apr 15 -12.5
(Ulmus americana)
Siberian elm (FF/Pollen) 9 ---- Apr 10 ---- Apr 14 ----
(Ulmus pumila)
roundlobe hepatica (Glenh.)13 Mar Apr 10(Apr 5) Apr 20 -16.0
(Anemone americana) 24/27
Cornelian cherry (garden) 7 Apr 2 Apr 10 Apr 5 Apr 20 -11.5
(Cornus mas)
leatherwood 16 Apr 1 Apr 10 Apr 5 Apr 21 -12.5
(Dirca palustris)
common chickweed 19 Apr 13(Apr 10)---- (May 15) +3.0
(Stellaria media)
tremblng aspen (Pollen/PB) 11(Apr 2) Apr 12 ---- Apr 17 -10.0
(Populus tremuloides)
sharplobed hepatica 22 Apr 1 Apr 12(Apr 13)Apr 23 -10.5
(Anemone acutiloba)
slippery elm (FF/Pollen) 11 ---- Apr 13 ---- Apr 17 ----
(Ulmus rubra)
red maple 12 ---- Apr 13 Mar 24 Apr 20 -27.0
(Acer rubrum)
blue squill 22 Mar 31 Apr 13(Apr 12)Apr 24 -12.5
(Scilla siberica)
northern blue violet 19 Apr 2 Apr 15(Apr 12)Apr 23 -12.0
(Viola septentrionalis)
spicebush 13(Apr 8) Apr 15(Apr 17)Apr 24 -7.0
(Lindera benzoin)
striped squill (garden) 19 Apr 2 Apr 15(Apr 11)Apr 25 -13.5
(Puschkinia spp)
Persian speedwell (Glenh.) 10(Mar22)(Apr 15) ---- Apr 30E -24.0
(Veronica persica)
common groundsel 3 ---- (Apr 16) ---- ---- ----
(Senecio vulgaris)
white squill 21 Apr 3 Apr 16(Apr 1 Apr 24 -18.0
(Scilla siberica alba)
bloodroot 24 Mar Apr 17(Apr 11)Apr 24 -18.5
(Sanguinaria canadensis) 24/27
blue cohosh 15(Apr 8) Apr 17(Apr 20)Apr 28 -8.5
(Caulophylum thalictroides)
periwinkle 20 Mar 30 Apr 18(Apr 25)May 5 -14.5
(Vinca minor)
heart-leaved willow 6(Apr 2)(Apr 19)Apr Apr 26 -11.8
(Salix eriocephala) 19/20
early buttercup (Mohawk) 11(Apr 10)Apr 19 ---- Apr 27 -9.0
(Ranunculus fascicularis)
spring bluebell spp 19 Apr 11 Apr 19(Apr 18)Apr 27 -8.5
(Scilla spp(star-flowered))
spring beauty 18 Mar 31 Apr 19(Apr 20)May 3 -16.0
(Claytonia virginica)
pussy willow 17 ---- Apr 20(Apr 7) Apr 25 -18.0
(Salix dicolor)
Manitoba maple (FF/Pollen) 16 Apr 3 Apr 20 ---- Apr 25 -17.0
(Acer negundo)
garden daffodil (in open) 16 Apr6/7 Apr 20 ---- Apr28 -13.5
(Narcissus pseudo-narcissus)
forsythia 20(Apr 6) Apr 20(Apr 11)May 1 -17.0
(Forsythia spp)
wild ginger 20 Apr 4 Apr 21(Apr 15)Apr 28 -15.0
(Asarum canadense)
purple cress 17 Apr 11 Apr 22 Apr 17 May 2 -13.0
(Cardamine douglassii)
yellow trout lily 20 Apr 10 Apr 22 Apr 21 May 2 -11.5
(Erythronium americanum)
early saxifrage 11 Apr 3 Apr 22 ---- May 9 -19.0
(Saxifraga virginiensis)
shepherd's purse 11(Apr 15)Apr 23 ---- May 10 -8.0
(Capsella bursa-pastoris)
hairy wood rush 13 ---- Apr 24 ---- Apr 28 ----
(Luzula acuminata)
red trillium 21 Apr Apr 24 Apr 21 Apr 30 -9.2
(Trillium erectum) 14/15
Penn. sedge (Pollen/PB) 12(Apr 12)Apr 24 ---- Apr 30 -12.0
(Carex pensylvanica)
Dutchman's breeches 22 Apr 11 Apr 24 ---- May 5 -13.0
(Dicentra cucullaria)
Euro. corydalis (garden) 19 Apr 14 Apr 25 Apr 22 Apr 30 -9.5
(Corydalis bulbosa)
cutleaf toothwort 21 Apr 12 Apr 25 Apr 23 May 5 -12.5
(Dentaria laciniata)
dandelion (in open) 28(Apr 6) Apr 25 Apr 21 May 8 -18.0
(Taraxacum officinale)
field horsetail(Pollen/PB) 17(Apr 18)Apr 26 ---- Apr 30 -8.0
(Equisetum arvense)
weeping willow 15(Apr 8) Apr 26 ---- May 4 -18.0
(Salix alba vitellina)
field strawberry 18 Apr 15 Apr 26 May 1 May 14 -12.0
(Fragaria virginiana)
Canada plum (garden) 20 ---- Apr 27 ---- May 3 ----
(Prunus nigra)
serviceberry 15(Apr 14)Apr 27 ---- May 4 -13.0
(Amelanchier arborea)
marsh-marigold 17 Apr Apr 27 ---- May 5 -11.5
(Caltha palustris) 15/16
white trout lily 21 Apr 12 Apr 27 Apr 22 May 6 -14.5
(Erythronium albidum)
coltsfoot (seeds open) 20 ---- Apr 27 Apr 26 May 7 -11.0
(Tussilago farfara)
lesser celandine 19 Apr 12 Apr 27 ---- May 7 -15.0
(Ranunculus ficaria)
ground ivy 22 Apr 12 Apr 27(Apr 25)May 14 -17.0
(Gleuchoma hederacea)
wood anemone 16 Apr 11 Apr 28 ---- May 7 -17.0
(Anemone quinquefolia)
Norway maple 16 ---- Apr 28 ---- May 7 ----
(Acer platanoides)
large-flowered bellwort 21 Apr 13 Apr 28 Apr 25 May 7 -13.5
(Uvularia grandiflora)
white trillium 21 Apr Apr 28 Apr 29 May 8 -10.8
(Trillium grandiflorum) 15/16
small alyssum (Glenh'st) 12(Apr 24)Apr 28 ---- May 10 -4.0
(Alyssum alyssoides)
European ash (pollen)/PB 5 ---- Apr 29 ---- (May 2) ----
(Fraxinus excelsior)
sugar maple 10 ---- Apr 29(Apr 11)May 5 -24.0
(Acer saccharum)
fly honeysuckle 16 ---- Apr 29 ---- May 11 ----
(Lonicera canadensis)
rue-anemone (garden) 19 Apr 22 Apr 29 ---- May 13 -7.0
(Thalictrum thalictroides)
twinleaf (garden) 20 Apr 13 Apr 30 Apr May 3 -17.2
(Jeffersonia diphylla) 15/16
common blue violet 15 Apr 16 Apr 30(Apr 30)May 12 -13.0
(Viola papilionacea)
prickly gooseberry 15(Apr 15)Apr 30(Apr 28)May 12 -14.5
(Ribes cynosbati)
crack willow 12 ---- May 1 ---- May 7 ----
(Salix fragilis)
dog violet 18 Apr 16 May 1 (May 2) May 10 -11.5
(Viola conspersa)
grape hyacinth (garden) 15 ---- May 1 (May 6) May 12 -6.0
(Muscari botryoides)
kidneyleaf buttercup 12 Apr 14 May 1 Apr 23 May 13 -18.5
(Ranunculus abortivus)
pussytoes 10 Apr May 1 ---- May 14 -16.0
(Antennaria neglecta) 15E
yellow violet 21 Apr May 1 (Apr 29)May 15 -14.8
(Viola pubescens) 17/18
smooth serviceberry 13 Apr 16 May 2 Apr 21 May 5 -15.0
(Amelanchier laevis)
henbit 14 Apr 12(May 2) ---- (May 18) -20.0
(Lamium amplexicaule)
Euro. white birch (Pollen) 16 Apr11E May 3 ---- May 8 -22.0
(Betula pendula)
sweet cherry spp 9 ---- May 3 (Apr 26)May 8 -12.0
(Prunus avium)
cypress spurge 11 ---- May 3 ---- May 18 ----
(Euphorbia cyparissias)
prairie smoke (garden) 11 Apr 22 May 3 (May 15)May 18 -7.0
(Geum triflorum)
European red currant 13 ---- May 4 ---- May 12 ----
(Ribes rubrum)
toad trillium (garden) 21 Apr 21 May 4 (May 5) May 12 -10.0
(Trillium sessile)
red-berried elder 16 Apr May 4 May 1 May 15 -13.2
(Sambucus pubens) 21/22
wood poppy (garden) 21 Apr May 4 May May 15 -15.5
(Stylophotum diphyllum) 16/17 1/2
jack-in-the-pulpit 22(Apr 19)May 4 (May 5) May 17 -13.5
(Arisaema triphyllum)
wild pear 10(Apr 18)May 5 (Apr 26)May 8 -14.5
(Pyrus communis)
early meadow rue 18(Apr 19)May 5 ---- May 8 -16.0
(Thalictrum dioicum)
Red Haven peach (garden) 14 ---- May 5 ---- May 11 ----
(Prunus persica)
long-spurred violet 16(Apr 18)May 5 (Apr 30)May 15 -16.0
(Viola rostrata)
garlic mustard 18 Apr 24 May 5 (May 7) May 20 -12.0
(Alliaria officinalis)
blue beech (Pollen) 12(Apr 21)May 6 ---- (May 8) -15.0
(Carpinus caroliniana)
hop hornbeam (Pollen) 10(Apr 22)May 6 ---- (May 9) -14.0
(Ostrya virginiana)
redbud (garden) 12 Apr May 6 May 7 May 15 -8.3
(Cercis canadensis) 27/28
red baneberry 19 Apr May 6 (Apr 29)May 16 -15.8
(Actea rubra) 21/22
Virginia bluebells 22 Apr 19 May 6 May 5 May 17 -14.5
(Mertensia virginica)
honesty 18 Apr 18 May 6 (May 3) May 17 -16.0
(Lunaria annua)
buffalo currant 17 ---- May 7 Apr May 12 -17.5
(Ribes odoratum) 24/25
pin cherry 10 Apr 23 May 7 May 1 May 12 -12.5
(Prunus pensylvanica)
field pennycress 13 ---- May 7 ---- (May 18) ----
(Thlaspi arvense)
forget-me-not 23 Apr 24 May 7 (May 10)May 20 -11.5
(Myosotis scorpioides)
yellow rocket 24 Apr 30 May 7 (May 10)May 22 -9.5
(Barbarea vulgaris)
butternut (FF/pollen) 9 ---- May 8 (May 3) May -8.0
(Juglans cinerea) 11-FP
bishop's cap (garden) 7 ---- May 8 ---- May 17 ----
(Mitella diphylla)
Canada violet (garden) 22 Apr 30 May 8 (May 13)May 24 -9.5
(Viola canadensis)
toothwort 16 Apr 21 May 9 Apr 29 May 18 -18.5
(Dentaria diphylla)
star Solomon's seal 12(May3/4)May 9 (May 9) May 21 -8.8
(Smilacina stellata)
wild geranium 21 Apr May 9 (May 14)May 24 -10.2
(Geranium maculatum) 28/29
black oak pollen (Glenh.) 6 ---- May 10 ---- ---- ----
(Quercus velutina)
wayfaring tree 9 ---- May 10(May 6) May 16 -10.0
(Viburnum lanatana)
wild black currant 16 Apr May 10 May 5 May 19 -14.7
(Ribes americanum) 24/25
dandelion (seeds open) 20 Apr 24 May 10 ---- May 22 -16.0
(Taraxacum officinale)
thyme-leaved speedwell 22 Apr 18 May 10(May 6) May 22 -19.0
(Veronica serpyllifolia)
goldenseal (garden) 20 May 1 May 11 May 6 May 17 -10.5
(Hydrastis canadensis)
foamflower (garden) 21 May 1 May 11(May 12)May 23 -10.5
(Tiarella cordifolia)
corn speedwell 11 ---- May 11 ---- ---- ----
(Veronica arvensis)
rose mandarin (garden) 13 ---- May 12 ---- May 18 ----
(Streptopus roseus)
Japanese barberry 17 Apr 28 May 12 May May 21 -15.8
(Berberis thunbergii) 3/4
common purple lilac 29 May May 13 May 17 May 26 -9.8
(Syringa vulgaris) 2/3
white ash (pollen) 4 ---- (May 14) ---- ---- ----
(Fraxinus americana)
American plum 18 Apr 24 May 14 May 3 May 19 -18.0
(Prunus americana)
caragana (garden) 13 ---- May 14 ---- May 20 ----
(Caragana arborescens)
greater celandine 22 May 3 May 14(May7/8)May 21 -12.2
(Chelidonium majus)
white baneberry 16(Apr 30)May 14(May5/6)May 24 -16.2
(Actaea pachypoda)
black medic 11 ---- May 14 ---- (June 5) ----
(Medicago lupulina)
early hawthorn spp 16 May May 15 ---- May 21 -13.5
(Crataegus spp.) 1/2
horse chestnut 11 ---- May 15 May 7 May 23 -16.0
(Aesculus hippocastanum)
Solomon's seal 17 May 4 May 15 ---- May 24 -11.0
(Polygonatum pubescens)
bladdernut 12 May May 15(May 12)May 24 -12.2
(Staphylea trifolia) 2/3
star or bastard toadflax 12 May 5 May 15 ---- May 29 -10.0
(Commandra umbellata)
red oak (pollen) 7 ---- May 16 ---- ---- ----
(Quercus rubra)
wild crab apple 13 May 3 May 16(May 10)May 21 -12.0
(Malus coronaria)
chokecherry 25(May 1) May 16 May5/6 May 23 -16.2
(Prunus virginiana)
blue phlox (garden) 22 Apr 29 May 16 May 18 May 26 -12.5
(Phlox divaricata)
wild columbine 20 May 9 May 16(May 24)May 30 -6.5
(Aquilegia canadensis)
robin's plantain 9 ---- ---- May June 2 -15.5
(Erigeron pulchellus) 17/18
garden chives 17 May 11 May 16 May 30 June 7 -6.5
(Allium schoenoprasum)
dwf chinquapin (pollen) 10 May May 17 ---- ---- -5.0
(Quercus prinoides) 12E
white mulberry 8 ---- (May 18) ---- (May 24) ----
(Morus alba)
tartarian honeysuckle 19 May 2 May 18 May 14 May 27 -14.5
(Lonicera tartarica)
lily-of-the-valley 20 May 1 May 18 ---- May 27 -17.0
(Convallaria majalis)
great Sol. seal (garden) 19 May 5 May 19 May 17 May 25 -11.0
(Polygonatum biflorum)
winged euonymus (Glenh.) 7 ---- May 19 ---- May 29 ----
(Euonymus alata)
running strawberry bush 9 May 10 May 19 ---- June 7 -9.0
(Euonymus obvatus)
bur oak (pollen) 10 ---- May 20 ---- ---- ----
(Quercus macrocarpa)
starflower (garden) 12 ---- May 20 ---- (May 28) ----
(Trientalis borealis)
blue-eyed grass 10 May 20 May 20 ---- May 29 0.0
(Sisyrinchium montanum)
common buckthorn 16 May 5 May 20(May 15)May 29 -14.5
(Rhamnus cathartica)
wild lily-of-the-valley 14 May May 20 ---- May 29 -8.5
(Maianthemum canadense) 11/12
golden alexanders 19(May 2) May 20 May 20 May 31 -14.5
(Zizia aurea)
common barberry 12 May May 20 May May 31 -13.5
(Berberis vulgaris) 5/6 18/19
bird's-foot trefoil 15 May May 20(Jun 18)June 9 -4.3
(Lotus corniculatus) 2/3
autumn olive 13 May May 21 May 17 May 27 -11.8
(Elaeagnus umbellata) 7/8
cleavers 11(May 12)May 21 ---- (May 28) -9.0
(Galium aparine)
red-osier dogwood 20 May May 21 ---- May 31 -9.5
(Cornus stolonifera) 11/12
glaucous honeysuckle 13 May May 21 May June 1 -16.0
(Lonicera dioca) 2/3 18/19
common cinquefoil 8 ---- May 21 ---- (June 2) ----
(Potentilla simplex)
English hawthorn 10 ---- May 22 May 17 May 29 -12.0
(Crataegus monogyna)
Scots pine (pollen) 21 May 7 May 22 ---- ---- -15.0
(Pinus sylvestris)
mayapple 16 May May 22 May 19 May 30 -12.2
(Podophyllum peltatum) 8/9
white campion 8 ---- May 22 ---- June ----
(Silene pratensis) 11
rock sandwort (Glenhyrst) 12 May 18 May 23 ---- June 1 -5.0
(Arenaria stricta)
dame's rocket 28 May 13 May 23 May June 4 -10.0
(Hesperis matronalis) 25E
common mallow 3 ---- (May 24) ---- ---- ----
(Malva neglecta)
black cherry 15 May 10 May 24 May 17 May 29 -13.0
(Prunus serotina)
hound's-tongue 4 ---- (May 24) ---- June 4 ----
(Cynoglossum officinale)
purple vetch (Glenhyrst) 12 May 17 May 24(June 1)June 4 -5.0
(Vicia americana)
tall buttercup 20 May 16 May 24 ---- June 9 -8.0
(Ranunculus acris)
herb robert 20 May 13 May 25 ---- May 31 -12.0
(Geranium robertianum)
small yellow ladyslipper 15 May16E May 25 ---- June 2 -9.0
(Cypripedium calc.parv.)
Virginia waterleaf 22 May 13 May 25(May 26)June 4 -10.5
(Hydrophyllum virginianum)
anemone (Glenhyrst) 13(May 21)May 25(May 30)June 7 -6.0
(Anemone cylindrica)
false Solomon's seal 24 May 11 May 26 May June 1 -11.0
(Smilacina racemosa) 25E
Bridlewreath spirea 18 May 10 May 26 May June 2 -13.5
(Spirea vanhouttei) 22E
yellow wood sorrel 15 ---- May 26 ---- (June 4) ----
(Oxalis europa)
nannyberry 22 May 16 May 26 May 21 June 4 -12.5
(Viburnum lentago)
yellow goat's-beard 17 May 16 May 26 ---- June 4 -10.0
(Tragopogon pratensis)
charlock 23 ---- May 26 ---- June 8 ----
(Sinapsis arvensis)
cockspur hawthorn 8 ---- May 27 ---- (May 30) ----
(Crataegus crus-galli)
alternate dogwood 12 May 20 May 27(May 25)June 4 -9.0
(Cornus alternifolia)
wild red raspberry 14 May 14 May 27 ---- June 9 -13.0
(Rubus idaeus)
red clover 18 May 27 May 28 ---- June -1.0
(Trifolium pratense) 10
shagbark hickory (pollen) 4 ---- May 29 ---- ---- ----
(Carya ovata)
downy arrowwood 13 ---- May 29 May June 5 -12.0
(Viburnum rafinesquianum) 24E
orange horse gentian 7 May 16 May 29(May26)(June 5) -11.5
(Triosteum aurantiacum)
wild asparagus 10 May May 29(Jun 13) ---- -2.0
(Asparagus officinalis) 27E
white clover 11 ---- May 29 ---- June ----
(Trifolium repens) 11
carrion flower 5 May May 29(May29)(Jun 12) -10.0
(Smilax herbacea) 23E
common fleabane 28 May 10 May 29 ---- June -19.0
(Erigeron philadelphicus) 15
wormseed mustard 16 May May 29 ---- June +1.0
(Erysimum cheiranthoides) 30E 15
tufted or cow vetch 15 ---- May 29(Jun 21)June +2.0
(Vicia cracca) 19
black raspberry 11 May 17 May 30 ---- ---- -13.0
(Rubus occidentalis)
pussytoes, seed heads open 4 ---- (May 30) ---- (Jun 10) ----
(Antennaria neglecta)
Canada anemone 16 May May 30 June 3 June -9.5
(Anemone canadensis) 22E 13
ox-eye daisy 20 May May 30(Jun 14)June -10.8
(Leucanthemum vulgare) 13/14 19
black walnut (pollen) 8 ---- May 31 ---- ---- ----
(Juglans nigra)
slender vetch 5 ---- (May 31) ---- ---- ----
(Vicia tetrasperma)
yellow hawkweed 18 May 19 May 31(Jun 3) June -10.5
(Hieracium caespitosum) 12
hairy beardtongue 21(May 17)May 31 ---- June -14.0
(Penstemon hirsutus) 17
common comfrey 19(May 23)June 1 May (June 8) -8.8
(Symphytum officinale) 30/31
narrow-lvd hawk's-beard 8 ---- June 1 ---- ---- ----
(Crepis tectorum)
yellow sweet-clover 9 ---- June 1(Jun 19)June +1.0
(Melilotus officinalis) 18
ground cherry (Glenhyrst) 11 May June 2(Jun 14) ---- -8.0
(Physalis heterophylla) 25E
common blackberry 15 ---- June 2 May June -17.0
(Rubus allegheniensis) 26E 12
riverbank grape 20 May June 3 ---- June -10.0
(Vitis riparia) 24E 11
common speedwell 7(May 30)June 3 ---- June -4.0
(Veronica officinalis) 12
rugosa rose (garden) 18(May 22)June 4 June 8(Jun 18) -11.5
(Rosa rugosa)
alumroot (garden) 11 ---- June 4 ---- June ----
(Heuchera americana) 19
climbing nightshade 15 ---- June 4 ---- June ----
(Solanum dulcamara) 20
climbing bittersweet 11(May 26)June 5(Jun 5)(Jun 14) -9.5
(Celastrus scandens)
bladder campion 10 ---- June 5(Jun 9) June -7.0
(Silene cucubalus) 16
orange hawkweed 5 ---- June 5 ---- June ----
(Hieracium aurantiacum) 19
stinging nettle 10 May 30)June 5 ---- ---- -6.0
(Urtica dioica)
wild strawberry (fruit) 12 June June 5 ---- June -3.5
(Fragaria virginiana) 1/2 25
black locust 20 ---- June 6 May 28 June -15.0
(Robinia pseudo-acacia) 12
ninebark 14(May 25)June 6(Jun 1) June -13.0
(Physocarpus opulifolius) 15
poison ivy (Glenhyrst) 4 ---- (Jun 6) ---- (Jun 16) ----
(Rhus radicans)
crown vetch 11 May 28 June 6(Jun 22)June -6.0
(Coronilla varia) 25
dwarf snapdragon 5 ---- (Jun 7) ---- ---- ----
(Chaenorrhinum minus)
northern bedstraw 9 ---- June 7(Jun 1) June -19.0
(Galium boreale) 20
narrow-leaved vetch 11 ---- June 7(Jun 11)June -11.0
(Vicia sativa) 22
yarrow 16 May 17 June 7 ---- June -21.0
(Achillea millefolium) 23
maple-leaved viburnum 3 ---- (Jun 8) ---- June ----
(Viburnum acerifolium) 11
smooth wild rose 19(May 25)June 8(June 2)June -15.0
(Rosa blanda) 18
goutweed 20 May 28 June 8(Jun11)(Jun 23) -11.5
(Aegopodium podagraria)
wild madder 11(May 31)June 8 June June -6.0
(Galium mollugo) 21 25
field bindweed 8 ---- June 8 ---- (Jun 29) ----
(Convolvulus arvensis)
false indigo (garden) 15(May 26)June 9 June June -12.8
(Amorpha fruticosa) 3/4 15
round-leaved dogwood 8 ---- June 9 May 28 June -18.0
(Cornus rugosa) 15
sweetbrier 5 ---- June 9 ---- (Jun 18) ----
(Rosa rubiginosa)
rough-fruited cinquefoil 17 May 29 June 9 ---- June -11.0
(Potentilla recta) 20
spiked lobelia (Hardy Rd) 5 ---- ---- ---- (Jun 26) ----
(Lobelia spicata)
mossy stonecrop 13 ---- June ---- June ----
(Sedum acre) 10 22
wild mock-orange 13 May 31 June June 9 June -13.0
(Philadelphus inodorous) 10 25
butter-and-eggs 13(Jun 12)June ---- (Jun 28) +2.0
(Linaria vulgaris) 10
rough cinquefoil 14 May 31(Jun 11) ---- ---- -11.0
(Potentilla norvegia)
south'n arrowwood (garden) 6 ---- June ---- June ----
(Viburnum dentatum) 11 14
Indian hemp 10 June June (Jul 1)(Jul 1) +2.0
(Apocynum cannabinum) 15 11
tall meadow rue 14 June June June July 5 -10.2
(Thalictrum pubescens) 3/4 11 22
nodding thistle 22 May 30 June ---- ---- -13.0
(Carduus nutans) 12
common privet 10(May 31)June June June -12.2
(Ligustrum vulgare) 12 8/9 21
alfalfa 15(May 30)June ---- June -13.0
(Medicago sativa) 12 27
broad-leaved dock 5 June (Jun 13) ---- ---- -8.5
(Rumex obtusifolius) 4/5
rough avens 14(Jun 3) June ---- (Jun 16) -10.0
(Geum laciniatum) 13
multiflora rose 13 ---- June June 4 June -17.0
(Rosa multiflora) 13 21
yellow goat's-beard (seed) 18 June 3 June ---- ---- -10.0
(Tragopogon pratensis) 13
sweet William 17 May 30 June ---- (Jun 22) -15.0
(Dianthus barbatus) 14
foxglove beardtongue 18 May 31 June June June -11.0
(Penstemon digitalis) 14 14 22
hedge bindweed 5 May 31(Jun 15) ---- ---- -15.0
(Convolvulus sepium)
lady's thumb 8 May 30(Jun 15) ---- ---- -16.0
(Polygonum persicaria)
yellow avens 12 June 8 June (Jun 21)June -5.5
(Geum aleppicum) 15 25
purple-flowering raspberry 8 ---- June ---- (Jun 29) ----
(Rubus odoratus) 15
riverbank anemone 11(Jun14)(Jun 15) ---- June -1.0
(Anemone riparia) 29
yellow hawkweed (seeds) 4 ---- June ---- ---- ----
(Hieracium caesoitosum) 16
silky dogwood 5 ---- June ---- (Jun 24) ----
(Cornus obliqua) 17
wild 4-o'clock 7 May 30 June ---- ---- -18.0
(Mirabilis nyctaginea) 17
sow thistle spp 10 ---- June ---- ---- ----
(Sonchus spp) 18
grey dogwood 24 May 31 June June June -17.8
(Cornus racemosa) 18 7/8 25
staghorn sumac 8 ---- June ---- June ----
(Rhus typhina) 18 29
common St.John's-wort 14 June June June July 7 -8.5
(Hypericum perforatum) 9E 18 29E
chicory 14(Jun 5) June (Jul 5)(Jul 8) -8.0
(Cichorium intybus) 18
white sweet-clover 11(Jun 5) June ---- July -13.0
(Melilotus alba) 18 12
wild garlic 7 June June ---- June -3.5
(Allium canadense) 15/16 19 25
white avens 18 June 5 June June June -12.0
(Geum canadense) 19 15 25
common sundrops (garden) 20 June 5 June June June -10.5
(Oenothera fruticosa) 19 20 27
moneywort 18 June June ---- June -5.0
(Lysimachia nummularia) 14 19 28
Deptford pink 14 June June (Jun 24)July 6 -13.2
(Dianthus armeria) 4/5 19
harebell (garden) 8 June 2(Jun 19) ---- ---- -17.0
(Campanula rotundifolia)
common milkweed 17 June June ---- July -8.0
(Asclepias syrica) 11 19 10
heal-all 18 June June ---- (Jul 10) 0.0
(Prunella vulgaris) 19 19
flowering spurge (Glenh.) 12(Jun11)(Jun 19) ---- Aug 5 -8.0
(Euphorbia corollata)
spreading dogbane 14 June 6 June ---- July 3 -14.0
(Apocynum androsaemilfolium) 20
burning bush (garden) 14 June June July 2 July 4 -2.5
(Euonymus atropurpureus) 18 21
butterfly weed (Hardy Rd) 12 ---- June July 4 July 5 -1.0
(Asclepias tuberosa) 21
wild parsnip 13 June June ---- July -5.0
(Pastinaca sativa) 16 21 14
false spirea 5 ---- (Jun 22) ---- ---- ----
(Sorbaria sorbifolia)
catalpa 20 June June ---- July 1 -18.5
(Catalpa speciosa) 3/4 22
common elderberry 11 ---- June (Jun 19)July 1 -12.0
(Sambucus canadensis) 22
motherwort 18(Jun 11)June (Jun 24)July 4 -10.5
(Leonurus cardiaca) 22
wild quinine (garden) 17 June 6 June July 2 July -13.5
(Parthenium integrifolium) 22 13
queen-of-the-meadow (gdn) 13 June June ---- July 1 -6.0
(Filipendula ulmaria) 17 23
green milkweed (Glenhyrst) 8(Jun11)(Jun 23) ---- (Jul 5) -12.0
(Asclepias viridiflorus)
wild basil 21 June June (Jul 6)(Jul 9) -3.0
(Satureja vulgaris) 20 23
Canada thistle 17(Jun 18)June ---- July -5.0
(Cirsium arvense) 23 11
smooth sumac 11 June June ---- June -10.0
(Rhus glabra) 14 24 30
purple loosestrife 11 June (Jun 24) ---- (Jul 16) +4.0
(Lythrum salicaria) 28
mayweed 6 ---- June ---- July 8 ----
(Anthemis cotula) 25
Queen Anne's lace 20 June June ---- (Jul 29) -11.0
(Daucus carota) 14E 25
Virginia creeper 6 June June ---- ---- -10.0
(Parthenocissus inserta) 16 26
orange day-lily 19 June June June July -12.0
(Hemerocallis fulva) 14 27 30 11
common mullein 19(Jun 16)June ---- July -12.0
(Verbascum thapsus) 28 14
black-eyed Susan 21 June June (Jul 5) July -9.0
(Rudbeckia hirta) 21 28 16
red raspberry (fruit) 18 June June ---- July -11.0
(Rubus idaeus) 17 28 16
agrimony 11 ---- June ---- (Jul 17) ----
(Agrimonia gryposepala) 28
fringed loosestrife 11 June June (Jul 4) July -7.0
(Lysimachia ciliata) 23 29 12
catnip 18 June June (Jul 6) July -4.0
(Nepeta cataria) 27 29 12
Dillen's tick-trefoil(Glen.)9(Jun 26)June ---- (Jul 7) -4.0
(Desmodium dillenii) 30
Michigan lily 14 June June (Jul 2) July 8 -7.0
(Lilium michiganense) 22 30
enchanter's nightshade 20 June June July 2 July 9 -8.5
(Circaea quadrisulcata) 20 30
spotted cowbane 9 June (Jun 30) ---- (Jul 15) -8.0
(Cicuta maculata) 22
Canada lily (garden) 7 June July 1 ---- ---- -6.0
(Lilium canadense) 25
creeping bellflower 19(Jun 21)July 1(Jul 6) July -11.0
(Campanula rapunculoides) 18
spotted jewelweed 4 ---- July 1 ---- ---- ----
(Impatiens capensis)
hoary vervain (garden) 7 ---- July 2 ---- ---- ----
(Verbena stricta)
white vervain 12(Jun 26)July 2 ---- ---- -6.0
(Verbena urticifolia)
carpenter's square 6(Jun25)(Jul 3) ---- ---- -8.0
(Scrophularia marilandica)
black raspberry (fruit) 21 June July 3 ---- (Jul 21) -11.0
(Rubus occidentalis) 22
swamp milkweed 10 ---- July 4 ---- (Jul 12) ----
(Asclepias incarnata)
evening-primrose 17 July 5 July 4(Aug 17) ---- +1.0
(Oenothera parviflora)
oxeye (false sunflower) 12 June July 4 ---- July -13.0
(Heliopsis helianthoides) 21 30
pale jewelweed 10 June July 4 ---- (Aug 14) -8.0
(Impatiens pallida) 26
Virginia stickseed 4(Jun 29) ---- ---- ---- ----
(Hackelia virginiana)
blue vervain 8(Jun 26)July 5 ---- July -9.0
(Verbena hastata) 20
bouncing bet 10 June July 5 ---- July -7.0
(Saponaria officinalis) 28 20
American basswood 7(Jun 26)July 6 ---- July 9 -10.0
(Tilia americana)
showy tick-trefoil (Glenh.)14(Jun26)(Jul 7) ---- ---- -11.0
(Desmodium canadense)
wild lettuce 8 June (Jul 7) ---- ---- -13.0u
(Lactuca canadensis) 24 7)
wild leek (garden) 10 June July 8 ---- July -9.0
(Allium tricoccum) 29 18
lopseed (Hardy Rd) 4 July 4(Jul 8) ---- (Jul 19) -4.0
(Phryma leptostachya)
Oswego tea (garden) 21 June July 8 July 6 July -14.0
(Monarda didyma) 24 20
wild bergamot 18 June July 9(Jul 16)July -7.0
(Monarda fistulosa) 27 18
wood sage or germander 6 ---- (Jul 9) ---- July ----
(Teucrium canadense) 22
Canada thistle (seeds) 4 ---- (Jul 9) ---- (Jul 27) ----
(Cirisium arvense)
hairy willow herb 7 ---- July 9 ---- (Jul 30) ----
(Epilobium hirsutum)
prickly lettuce 3(Jul17)(Jul 9) ---- ---- +8.0
(Lactuca scariola)
Virg. Mt. mint (garden) 18 June July July Aug 3 -10.5
(Pycanthemum virginianum) 30 10 23
tansy 19 June July ---- (Aug 10) -10.0
(Tanacetum vulgare) 30 10
wild hydrangea (garden) 13 July July ---- (Jul 18) -3.5
(Hydrangea arborescens) 7/8 11
marshmallow (garden) 8 July 3(Jul 11) ---- (Jul 27) -8.0
(Althea officinalis)
elecampane 4 ---- July (Jul 20) ---- ----
(Inula helenium) 11
early goldenrod 12 ---- July ---- Aug 4 ----
(Solidago juncea) 11
European speedwell 8 ---- (Jul 12)July ---- ----
(Veronica spp) 20
queen-of-the-prairie (gdn) 10 ---- July ---- July ----
(Filipendula rubra) 12 21
northern willowherb 4 ---- (Jul 13) ---- ---- ----
(Epilobium glandulosum)
spikenard (garden) 12 July 4 July ---- (Jul 21) -9.0
(Aralia racemosa) 13
tall cinquefoil (garden) 7 July (Jul 14) ---- ---- 0.0
(Potentilla arguta) 14E
woodland sunflower (Glenh.)10 ---- (Jul 14) ---- (Jul 28) ----
(Helianthus divaricatus)
virgin's bower 10 July July Aug 20 Aug 14 +0.5
(Clematis virginiana) 9E 14
side-oats gramma (prairie) 6 ---- July ---- (Jul 27) ----
(Bouteloua curtipendula) 15
downy willowherb 7 ---- July ---- (Jul 27) ----
(Epilobium strictum) 15
teasel 16 July 7 July ---- Aug 6 -8.0
(Dipsacus fullonum) 15
sow thistle spp (seeds) 4 ---- (Jul 16) ---- ---- ----
(Sonchus spp)
helleborine orchid 9 July July (Jul 11)July -14.8
(Epipactis helleborine) 3/4 16 28
Culver's root (garden) 12 July 7 July (Jul 18)July -11.5
(Veronicastrum virginicum) 17 31
buttonbush (garden) 9 July 4 July ---- (Jul 24) -14.0
(Cephalanthus occidentalis) 18
black cohosh (garden) 17 July July (Jul18)(Aug 2) -13.8
(Cimicifuga racemosa) 5/6 18
gray-head coneflower (gdn) 18 July 8 July July Aug 3 -10.0
(Ratibida pinnata) 18 24
spearmint (garden) 10(Jul 20)July ---- (Aug 5) +2.0
(Mentha spicata) 18
large-leaved aster 18(Jul 14)July ---- Aug 14 -4.0
(Aster macrophyllus) 18
wild marjoram (Paris) 7 ---- ---- ---- (Aug 4) ----
(Origanum vulgare)
common burdock 19(Jul 15)July ---- (Aug 8_ -4.0
(Arctium minus) 19
lamb's quarters (pigweed) 4 ---- (Jul 20) ---- ---- ----
(Chenopodium alba)
Indian tobacco 4 ---- July ---- (Jul 31) ----
(Lobelia inflata) 20
big bluestem (prairie) 11(Jul 16)July ---- Aug 7 -4.0
(Andropogon gerardii) 20
boneset 10 ---- July (Aug 20)Aug 13 +7.0
(Eupatorium perfoliatum) 20
bull thistle 11 ---- July ---- (Aug 13) ----
(Cirsium vulgare) 20
tall bellflower (garden) 4 ---- (Jul 22) ---- ---- ----
(Campanula americana)
joe-pye weed 8 ---- July ---- Aug 13 ----
(Eupatorium maculatum) 23
prairie onion (garden) 7 ---- July ---- Aug 2 ----
(Allium stellatum) 24
cup-plant (garden) 14 July July (Aug 18)Aug 18 -3.5
(Silphium perfoliatum) 17 24
great ragweed (pollen) 12 July July (Aug14)(Aug 18) -5.0
(Ambrosia trifida) 19 26
wild cucumber 9 ---- July Aug 17 Aug 17 0.0
(Echinocystis lobata) 28
horseweed 8 July (Jul 29) ---- ---- -10.0
(Erigeron canadensis) 19
wild senna (garden) 14 Aug 6 July Aug 16 Aug 10 6.0
(Cassia hebecarpa) 31
round bush clover (prairie) 6 ---- July ---- (Aug 15) ----
(Lespedeza capitata) 31
tiger lily (garden) 13(Jul 16)Aug 1 ---- (Aug 7) -16.0
(Lilium tiginum)
prairie-dock (garden) 10 Aug 2 Aug 2 (Aug 25)Aug 24 +0.5
(Silphium terebinthinaceum)
thin-lf coneflower (garden) 8 ---- Aug 4 ---- Aug 26 ----
(Rudbeckia triloba)
grass-leaved goldenrod 16 Aug 9 Aug 4 ---- Sept 4 +5.0
(Solidago graminifolia)
great blue lobelia 11 ---- Aug 6 ---- Aug 24 ----
(Lobelia siphilitica)
white snakeroot 10 ---- (Aug 7) ---- (Aug 28) ----
(Eupatorium rugosum)
Prince's feather (garden) 5 ---- (Aug 8) ---- Aug 24 ----
(Polygonum orientale)
rigid goldenrod (garden) 13 Aug 6 Aug 8 ---- Aug 30 -2.0
(Solidago rigida)
green-headed coneflower 10 July (Aug 9) ---- (Aug 15) -11.0
(Rudbeckia laciniata) 29
little bluestem (prairie) 6 ---- Aug 10 ---- ---- ----
(Andropogon scoparius)
smooth aster (Paris trail) 8 ---- Aug 10 ---- (Sep 10) ----
(Aster laevis)
southern ironweed (garden) 13 Aug 7 Aug 11 ---- Aug 17 -4.0
(Veronia crinita)
mayapple (fruit ripe) 4 ---- (Aug 11) ---- ---- ----
(Podophyllum peltatum)
largeflower gaura (garden) 10 July Aug 11 ---- Aug 29 -20.0
(Gaura longiflora) 22
zig-zag goldenrod 14(Aug 8) Aug 11 ---- Sept 9 -3.0
(Solidago flexicaulis)
common ragweed (pollen) 9 ---- Aug 12 ---- ---- ----
(Ambrosia artemisiifolia)
tall sunflower (Hardy Rd) 8 ---- Aug 12 ---- (Sep 6) ----
(Helianthus giganteus)
Canada goldenrod 17 ---- Aug 12 ---- Sept ----
(Solidago canadensis) 12
wild grape (fruit ripe) 3 ---- (Aug 12) ---- ---- ----
(Vitis riparia)
tall coreopsis (garden) 11(Jul 31)Aug 13 ---- Aug 31 -13.0
(Coreopsis tripteris)
switch grass (garden) 10(Aug 10)Aug 14 ---- ---- -4.0
(Panicum virgatum)
groundnut (Grand River) 5 ---- (Aug 15) ---- ---- ----
(Apios americana)
false dragonhead (garden) 15(Aug 15)Aug 15 ---- ---- 0.0
(Physostegia virginiana)
flat-topped aster 6 ---- (Aug 16) ---- (Sep 5) ----
(Aster umbellatus)
blue-stem goldenrod 10 Ayg Aug 17 ---- (Sep 6) -4.0
(Solidago caesia) 13E
gray goldenrod 14(Aug 15)Aug 17 ---- Sept 9 -2.0
(Solidago nemoralis)
arrow-leaved aster 12(Aug 20)Aug 17 ---- Sept +3.0
(Aster sagittifolius) 14
New England aster 17(Aug 20)Aug 17 ---- Sept +3.0
(Aster novae-angliae) 19
turtlehead (Paris) 8 ---- Aug 18(Sep 3)(Aug 28) +6.0
(Chelone glabra)
nodding ladies'-tresses 6 ---- (Aug 18) ---- Sept 1 ----
(Spiranthes cernua)
grass-of-Parnassus (Paris) 7 ---- (Aug 18) ---- (Sept 3) ----
(Parnassia glauca)
Indian grass (Paris) 9 ---- Aug 19 ---- (Sept 1) ----
(Sorgastrum nutans)
white lettuce 9 Aug 16 Aug 19 ---- (Sept 3) -3.0
(Prenanthes alba)
calico aster 12 Aug 23 Aug 19 ---- Sept +4.0
(Aster lateriflorus) 13
swamp aster (Paris trail) 7 ---- Aug 19 ---- Sept ----
(Aster puniceus) 15
small panicled aster(early)13 Aug 22 Aug 20 ---- ---- +2.0
(Aster lanceolatus spp)
thin-leaved sunflower 4 ---- (Aug 21) ---- ---- ----
(Helianthus decapetalus)
frost aster 12 Aug 23 Aug 21 ---- (Sep 20) +2.0
(Aster pilosus)
nodding bur-marigold 4 ---- (Aug 22) ---- (Sep 13) ----
(Bidens cernua)
beggar ticks 10 ---- Aug 23 ---- (Sep 11) ----
(Bidens frondosa)
sky-blue aster (prairie) 10 Aug 20 Aug 23 ---- (Sep 20) -3.0
(Aster oolentangiensis)
rough-lvd goldenrod (Paris) 6 ---- Aug 24 ---- (Sep 5) ----
(Solidago patula)
heart-leaved aster 6 ---- (Aug 24) ---- Sept ----
(Aster cordifolius) 17
large-leaved aster (seeds) 5 ---- (Aug 27) ---- ---- ----
(Aster macrophyllus)
red turtlehead (garden) 6 ---- Aug 27 ---- (Sep 9) ----
(Chelone obliqua)
strawberry bush (fruit) 6 Aug 23(Aug 28) ---- ---- -5.0
(Euonymus obvatus)
lance-leaved aster 9 ---- (Aug 29) ---- Sept ----
(Aster lanceolatus) 20
fringed gentian (Hardy Rd) 7 ---- Sept 5 ---- Sept ----
(Gentiana crinita) 13
heath aster 9 ---- Sept 6 ---- (Sep 25) ----
(Aster ericoides)
beechdrops 9 Sept 1 Sept ---- (Sep 21) -10.0
(Epifagus virginiana) 11
max. sunflower (garden) 11 ---- Sept ---- Sept ----
(Helianthus maximilianii) 13 25
witch-hazel 6 ---- (Sep 22) ---- ---- ----
(Hamamelis virginiana)
zig-zag goldenrod (seeds) 6 ---- (Sep 27) ---- ---- ----
(Solidago flexicaulis)
SOME ADDITIONAL OBSERVATIONS:
Spring Peepers Calling 21 Mar 31 Apr 8 ---- ---- -8.0
Mourning Cloak Butterfly 31 Mar Apr 10 ---- ---- -23.0
18/24*
Wood Frogs Calling 12 Mar 28 Apr 10 ---- ---- -13.0
American toad calling 23 Apr 26 Apr 20 ---- ---- +6.0
Tent Caterpillar EggsHatch 15 Apr 10E Apr 22 ---- ---- -12.0
Bumblebee flying 17 Apr 10 Apr 24 ---- ---- -14.0
Cabbage White Butterfly 19 Apr 1 Apr 24 ---- May 1 -23.0
NOTE: FF= First Flowers/Pollen; PB= Peak/Mid-Bloom; E= Estimate
* (2 dates are noted for some species since very warm days
were followed by cold weather just as the flowers were
opening).
PROGRESS OF SEASONAL BLOOM COMPARED TO THE AVERAGE: (DAYS)
Apr 1-5 -13.5 May 1-5 -13.6
Apr 6-10 -13.3 May 6-10 -12.1
Mar 9-17 -11.8 Apr 11-15 -13.0 May 11-15 -11.0
Mar 17-22 -10.7 Apr 16-20 -13.9 May 16-20 -10.5
Mar 22-26 -17.4 Apr 21-25 -13.5 May 21-25 -9.9
Mar 27-31 -12.7 Apr 26-30 -12.6 May 26-30 -10.8
May31-Jun4 -12.0 Jun30-July4 -7.6 Jul30-Aug3 N/A
June 5-9 -13.0 July 5-9 -7.5 Aug 4-8 N/A
June 10-14 -7.8 July 10-14 -7.0 Aug 9-13 N/A
June 15-19 -5.6 July 15-19 -5.9 Aug 14-18 -0.4
June 20-24 -8.4 July 20-24 -9.7 Aug 19-23 +2.1
June 25-29 -6.9 July 25-29 N/A Aug 24-28 +1.0E
The 2010 spring season was unusually early. I noted some of the
earliest pheno records since I began recording dates from as far
back as the early 1970's. This year, however is not the earliest.
1945 and 1946 were two of the warmest March months in this area.
Old timers I have talked to relate that in those years the grass
had to be mowed before the end of March!
All data compiled by Ron Hepworth, Brantford, ON