Garden zones. Basic planting vegetable schedule

When to Plant Vegetable Seeds. Zone 6a Philadelphia, PA

Crop	Days to Maturity	Spring Planting Dates	Fall Planting Dates	Seed/Plants 100 ft.	Distance Between Rows	Distance Between Plants	Depth to Plant
Asparagus	2nd season	Apr 5 - 25		50 roots	3 to 5 ft.	1½ to 2 ft.	6 in.
Bean, bush	50-60	Apr 25 - May 30	July 25-Aug 5	½ lb.	3 ft.	2 to 4 in.	1-1½ in.
Bean, pole	65-75	May 10 - 20		½ lb.	3 ft.	6 to 12 in.	1-1½ in.
Bean, lima	65-75	May 10 -25		1 lb.	2 to 2½ ft.	3 to 4 in.	1-1½ in.
Beet	55-65	Apr 1 - 15	Aug 1 - Sept 25	1 oz.	2 to 2½ ft.	2 in.	1 in.
Broccoli	60-80	Mar 25 - Apr 5	Sept. 25 - 30	100 plants	2½ ft.	14 to 18 in.	-
Cabbage	65-80	Apr 1 - 20	Sept 20 -30	100 plants	2½ ft.	12 in.	-
Cantaloupe	80-90	May 10 - 20		1 oz.	4 to 6 ft.	3½ to 4 ft.	1½ in
Carrot	70-80	Mar 25 - Apr 10	Sept 20 -30	½ oz.	2 ft.	2 to 3 in.	½ in.
Cauliflower	55-60	Apr 1 - 20	Sept 20 - 30	100 plants	3 ft.	12 to 18 in.	-
Collard	55-70	Mar 20 - Apr 10		½ oz.	2½ ft.	8 to 16 in.	½ in.
Corn	80-100	May 1 - July 20		¼ lb.	3 to 3½ ft.	12 to 18 in.	2 in.
Cucumber	60-65	May 10 - 30		1 oz.	3½ to 5 ft.	3 to 4 ft.	1½ in.
Eggplant	75-90	May 15 - 25		50 plants	3 ft.	2½ to 3 ft.	-
Kale	50-70	Mar 25 - Apr 5		½ oz.	3 ft.	10 in.	½ in.
Kohlrabi	50-70	Apr 1 - 15	Sept 20 - 25	½ oz.	3 ft.	10 in.	½ in.
Lettuce	60-85	Apr 1 - May 15	Sept 1 - 15	½ oz.	2 to 2½ ft.	10 to 12 in.	½ in.
Mustard	40-50	Mar 25 - May 1	Aug 1 - 30	½ oz.	2 ft.	1 in.	½ in.
Okra	55-60	May 10 - 25		1 oz.	3 to 3½ ft.	6 in.	1 in.
Onion (mature)	100-120	Mar 25 - Apr 15	Sept. 1-Dec. 31	300 plants or ½ gal. sets	1 to 2 ft.	3 to 4 in.	¾ in.
Peas, garden	60-80	Mar 25 - Apr 10		1 lb.	2½ ft.	1 in.	1½-2 in.
Peas, southern	60-70	May 1 - 15	-	½ lb.	3 ft.	4 to 6 in.	1½-2 in.
Pepper	65-80	May 15 - 30	-	50 plants	2½ ft.	1½ to 2 ft.	-
Potato, Irish	70-90	Apr 1 - 15		1 peck	2½ to 3 ft.	10 to 14 in.	5 in.
Potato, sweet	90-150	May 15-June 5	-	100 plants	3½ ft.	12 in.	-
Radish	25-30	Mar 25 - May 1	Aug 1- 20	1 oz.	1½ ft.	1 in.	½ in.
Spinach	40-45	Apr 1 - 20	Aug 10 - Sept 20	1 oz.	1½ to 2 ft.	1 to 2 in.	¾ in.
Squash, bush	50-55	May 15 - 30		1 oz.	3 to 4 ft.	2 ft.	1½-2 in.
squash, winter	85-90	May 15 - 30	-	½ oz.	5 ft.	3 ft.	1½-2 in.
Tomato	70-85	May 15 - 30		50 plants	3 to 4 ft.	2½ to 3 ft.	-
Turnip	45-65	Mar 25 - May 1	Aug 5 - Sept 20	½ oz.	1 to 2 ft.	1 to 2 in.	½ in.
Watermelon	80-90	May 10 - 20		1 oz.	10 ft.	8 to 10 ft.	1½ in.

For other states use USDA zone guide http://www.garden.org/zipzone/