The super handy seed-starting guide disappeared from the Penn State Cooperative Extension’s much prettier (but much less useful, for POD, at least) website. Oh no!
Fortunately or not, things never really die online, they just require a little more dedicated Googling. A little gift from POD to the gardeners of Philadelphia:
SEED CHART (All plants are from seeds unless noted)
Mid-March to Mid-April: Peas, Onions, Leeks, Garlic, White Potatoes, Turnips, Cabbage, Greens, (Collard, Kale, Mustard)
Late March to Mid-May: Lettuce**, Radishes**, Beets**, Carrots**
Late March to late April: Shallots, Spinach**, Bok choy, Parsley (Plants: Leeks, Onions, Cabbage, Broccoli, Greens)
Early April to mid-June: Swiss chard, beets
Mid April to mid-May: Celery
Early May to mid-June: Watermelons, Melons, Winter squash, Summer squash, Cucumbers, Pumpkins (Plants: Sweet Potato)
Mid May to late June: Okra, Chinese cabbage, Corn, Peanuts, Lima beans
Mid May to mid-July: Beans (bush, pole, shell, dried)**
Mid May to late June: Black eyed peas (Plants: Eggplant, Peppers, Basil, Tomato)
Mid June to early July: Collards, Cabbage family, Celery
Early July to mid-August: Carrots, Beets, Swiss chard, (Plants: Cabbage, Broccoli, Greens)
Mid July to September: Radish**, Spinach**
Early August to September: Salad greens**, Greens (Mustard, etc.), Peas
Early September to early October: Garlic (For spring harvest)
** To extend harvest, plant every two weeks.