Zone 4b planting calendar
In zone 4b, the last spring frost usually comes around May 8 and the first fall frost around Sep 28. Here is what to do each month.
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Open the free planner →March
- Mar 13:
Start bell pepper seeds indoors (or buy plants later) - Mar 13:
Start hot pepper seeds indoors (or buy plants later) - Mar 13:
Start eggplant seeds indoors (or buy plants later) - Mar 13:
Start parsley seeds indoors (or buy plants later) - Mar 13:
Start chives seeds indoors (or buy plants later) - Mar 20:
Start tomato seeds indoors (or buy plants later) - Mar 20:
Start cherry tomato seeds indoors (or buy plants later) - Mar 27:
Sow spinach seeds in the bed - Mar 27:
Start kale seeds indoors (or buy plants later) - Mar 27:
Start broccoli seeds indoors (or buy plants later) - Mar 27:
Start cabbage seeds indoors (or buy plants later) - Mar 27:
Start cauliflower seeds indoors (or buy plants later) - Mar 27:
Sow pea seeds in the bed - Mar 27:
Start basil seeds indoors (or buy plants later)
April
- Apr 3:
Sow radish seeds in the bed - Apr 10:
Sow lettuce seeds in the bed - Apr 10:
Sow arugula seeds in the bed - Apr 10: Plant kale in the bed
- Apr 10:
Plant onion sets in the bed - Apr 10:
Sow green onion seeds in the bed - Apr 10:
Plant strawberries in the bed - Apr 10:
Plant blueberries in the bed (first harvest next year) - Apr 10:
Plant raspberries in the bed (first harvest next year) - Apr 10:
Plant rhubarb in the bed (first harvest next year) - Apr 17: Plant broccoli in the bed
- Apr 17: Plant cabbage in the bed
- Apr 17:
Sow carrot seeds in the bed - Apr 17:
Sow beet seeds in the bed - Apr 24:
Sow swiss chard seeds in the bed - Apr 24: Plant cauliflower in the bed
- Apr 24:
Plant seed potatoes in the bed - Apr 24: Plant parsley in the bed
- Apr 24:
Sow cilantro seeds in the bed - Apr 24: Plant chives in the bed
May
- May 8:
Sow dill seeds in the bed - May 15:
Sow bush bean seeds in the bed - May 15:
Sow pole bean seeds in the bed - May 22: Plant tomatoes in the bed
- May 22: Plant cherry tomatoes in the bed
- May 22: Plant bell peppers in the bed
- May 22: Plant hot peppers in the bed
- May 22:
Sow cucumber seeds in the bed - May 22:
Sow zucchini seeds in the bed - May 22:
Sow winter squash seeds in the bed - May 22:
Sow sweet corn seeds in the bed - May 22: Plant basil in the bed
- May 22:
Sow watermelon seeds in the bed - May 22:
Sow cantaloupe seeds in the bed - May 25: Start cabbage seeds indoors for a fall crop
- May 29: Plant eggplants in the bed
- May 29:
Plant sweet potatoes in the bed - May 29:
Sow okra seeds in the bed - May 30: Start broccoli seeds indoors for a fall crop
- May 30: Start cauliflower seeds indoors for a fall crop
June
July
- Jul 6: Plant cabbage again for a fall crop
- Jul 6: Sow carrot seeds again for a fall crop
- Jul 11: Plant broccoli again for a fall crop
- Jul 11: Plant cauliflower again for a fall crop
- Jul 16: Sow green onion seeds again for a fall crop
- Jul 16: Sow pea seeds again for a fall crop
- Jul 21: Plant kale again for a fall crop
- Jul 21: Sow swiss chard seeds again for a fall crop
- Jul 21: Sow beet seeds again for a fall crop
- Jul 26: Sow lettuce seeds again for a fall crop
- Jul 26: Sow cilantro seeds again for a fall crop
- Jul 31: Sow spinach seeds again for a fall crop
August
- Aug 5: Sow arugula seeds again for a fall crop
- Aug 17: Sow radish seeds again for a fall crop
- Aug 31:
Plant garlic cloves
Not usually grown outdoors in zone 4b
Thyme, Oregano, Rosemary, Blackberry (thornless), Fig (dwarf), Lemon (dwarf Meyer). Some of these can be grown in pots and moved indoors for winter.
Dates are estimates based on average frost dates for zone 4b. Your local dates may differ by a week or two.