• Skunk Cabbage, Symphlocarpus foetidus, March 13th
• Coltsfoot, Tussilago farfara, April 8th
• Dandelion, Taraxacum officinale, April 11th
• Pennsylvania Bittercress, Cardamine pennsylvanica, April 13th
• Ground Ivy, Glechoma hederacea, April 15th
• Purple Deadnettle, Lamium purpureum, April 18th
• Common Chickweed, Stellaria media, April 20th
• Violet, Viola spp., April 20th
• Sarvisberry, Amelanchier spp., April 24th, Easter Sunday
• Winter Cress, Barbarea vulgaris, April 27th
• Speedwell, Veronica spp., April 27th
• Eastern Redbud, Cercis canadensis, May 1st
• Great Chickweed, Stellaria pubera, May 2nd
• Wild Honeysuckle, Lonicera spp., May 5th
• Hawthorn trees, Crataegus spp., flower buds, May 7th
• Common (Philadelphia) Fleabane, Erigeron philadelphicus, May 13th
• Hawthorn trees, Crataegus spp., May 13th
• Bluets, Houstonia caerulea, May 15th
  • These were blooming earlier, but I do not have the exact date that I first noticed them. Early May.
• Black Cherry, Prunus serotina, May 15th
• Crabapple, Malus spp., May 15th
• Buttercups, Ranunculus spp., May 17th
• Dame's Rocket, Hesperis matronalis, May 18th
• Forget-me-nots, Myosotis scorpioides, May 22nd
• Black Locust, Robinia pseudoacacia, May 22nd
• Oaks, Quercus spp., May 22nd
• Sheep Sorrel, Rumex acetosella, May 22nd
• Red Clover, Trifolium pratense, May 27th
• Yellow Sweet Clover, Melilotus officinalis, May 27th
• Golden Ragwort, Senecio aureus, May 27th (?)
• Ox-eye Daisy, Chrysanthemum leucanthemum, May 29th
• Cat's Ear, Hypochoeris radicata, May 29th (?)
• Birdsfoot-Trefoil, Lotus corniculatus, May 29th
• Yellow Iris, Iris pseudacorus, May 29th
• White Clover, Trifolium repens, May 31st
• Alsike Clover, Trifolium hybridum, May 31st
• Cinquefoil, Potentilla spp., May 31st
• Multiflora Rose, June 7th
• Ninebark, June 9th
• Rough-fruited Cinquefoil, June 12th
• Sweet Pea, June 17th
• Chicory, June 17th
• Horse Nettle, June 19th
• Pineapple Weed, June 19th
• Butter 'n' Eggs, June 19th
• Spotted Touch-Me-Not, June 19th
• Black-eyed Susan, June 24th
• Milkweed, June 24th
• White Sweet Clover, June 24th
• Rhododendron (wild), July 3rd
• Queen Anne's Lace, July 22nd
• Cattails, August 30th

Also spotted...

• Mountain Laurel, ?
• Common Evening Primrose, June/July?
• Goldenrod spp., mid to late July
• Aster spp., late August (week of August 22nd)