When to Plant Vegetables: A Simple Month-by-Month Calendar
Every seed packet carries the same small print: “Plant after last frost” or “Sow 6 weeks before last frost.” That single date — your last spring frost date — is the anchor of the entire vegetable calendar. Everything else is counting forward and backward from it. This guide gives you a month-by-month planting calendar that works for most temperate zones (5–7), with the logic to adjust it for any climate.
What You Will Need
- Your frost dates — look up the average last spring frost and first fall frost for your town. This is the only number that matters.
- A garden planner or calendar — paper or app, to record sowings. See garden planners on Amazon.
- A soil thermometer — soil temperature beats calendar dates for warm-season crops. Find soil thermometers on Amazon.
- Seed packets and labels — organized by cool-season and warm-season.
The Month-by-Month Calendar
January–February: Planning and Indoor Starts (Warm Zones Only)
Order seeds, sketch the garden, and start onions, leeks, and early peppers indoors in late February. In cold zones, hold off on everything else — seedlings started too early get leggy and root-bound. Use the time to plan your beds and prep compost.
March: The First Sowings
As soon as the ground thaws and can be worked, direct-sow peas, spinach, lettuce, radishes, and carrots. Indoors, start tomatoes and peppers 6 to 8 weeks before your last frost. In warm zones, early March is already time for direct-sowing many crops.
April: Cool-Season Planting Peaks
Sow beets, turnips, chard, kale, more lettuce, and potatoes (in most zones). Transplant hardy brassicas — cabbage, broccoli, cauliflower — started indoors. Keep frost cloth handy for late cold snaps. The rule: cool-season crops go out now; warm-season crops stay inside.
May: The Transition Month
After your last frost date, everything changes. Transplant tomatoes, peppers, eggplants, and basil; direct-sow beans, corn, cucumbers, squash, and melons once soil hits about 60°F. Sow a second round of carrots and beets for summer harvest.
June: Warm-Season Planting Window Closes
Direct-sow the last of the beans, squash, and cucumbers in early June in cold zones. Start fall brassicas (Brussels sprouts, cabbage, broccoli) indoors now — they are the crops that make your fall garden possible.
July: The Fall Garden Starts Here
This is the most skipped month. Direct-sow fall carrots, beets, and turnips; sow kale, chard, and spinach for fall; transplant the brassicas you started in June. Protect midsummer sowings with shade cloth or a spot with afternoon shade — hot soil is the enemy of fall-garden germination.
August: More Fall Sowings
Sow more lettuce, arugula, spinach, and radishes every 2 to 3 weeks. Plant overwintering spinach in late August. In cold zones, this is the last window for many fall crops — check days-to-maturity against your first frost date before sowing.
September: Garlic Season Begins
In warm zones, plant garlic and shallots in late September or October. In cold zones, wait until October. Keep succession-sowing greens. Set up row covers for the first frosts in cold zones.
October: Planting the Overwintering Crops
Plant garlic and shallots in most zones (2 to 4 weeks before the ground freezes). Sow overwintering fava beans and peas in mild zones. Mulch root crops left in the ground for winter digging.
November–December: Wind Down
Harvest what remains, mulch garlic beds, and clean up spent plants. In mild zones, keep sowing greens under cover. Put the season’s notes into next year’s plan — the best calendar is the one you keep yourself. Our seasonal practices guide has a fuller rundown of each transition.
Adjusting This Calendar for Your Zone
- Cold zones (3–4): shift spring sowings 2 to 4 weeks later and fall sowings 2 to 4 weeks earlier. Use short-season varieties and start more indoors.
- Warm zones (8–9): plant cool-season crops in fall and winter instead of summer; warm-season crops go in earlier and can have a second planting in midsummer. Your “March” happens in February.
- Always trust soil temperature over the calendar: beans, corn, and squash need soil near 60°F; a thermometer ends the guesswork. Seeds germinate on warmth, not dates.
- Read the packet backward: for fall crops, count back from your first frost date using days-to-maturity plus a 10-day buffer — that is your true planting date.
FAQ
What is the best month to start a vegetable garden?
For most temperate zones, April is the busiest planting month — cool-season crops in early April, warm-season crops in late April or May after the last frost. But a well-run garden plants something in every month from March through October; the “start” is just whichever month matches your first crop.
How do I find my last frost date?
Your local extension service or a frost-date lookup for your zip code gives the average last spring frost and first fall frost. Use those two dates as your calendar anchors. They are averages — keep frost protection handy for two weeks on either side.
Can I plant vegetables in July and August?
Yes, and you should — this is the fall-garden window. Carrots, beets, turnips, kale, chard, spinach, and lettuce all go in from July through August for fall and winter harvests. Hot soil is the main obstacle; sow in shade, keep seeds moist, and consider a shade cloth.
What vegetables can I plant in October?
Garlic and shallots, overwintering onions in mild zones, and — in zones 7 and warmer — peas, fava beans, and spinach for spring harvest. In cold zones, October is for putting the garden to bed: mulching, cover-cropping, and planting garlic before the ground freezes.
Bottom Line
The perfect planting calendar is built from one date — your last frost — plus a habit of looking at every empty bed as a slot for something. March through May for the main garden, June through August for the fall garden, and September through November for garlic and overwintering crops. Mark the frost dates, buy a soil thermometer, and let the calendar follow the soil, not the other way around.
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