What to Plant in March: Zone 8 Vegetable Garden Guide
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March in Zone 8 is peak planting season. Your last frost is behind you (or nearly so), and you can plant almost everything. This is your window before summer heat arrives.
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Quick Answer
In Zone 8, March is go-time. Plant cool-season crops immediately (they'll bolt in summer heat), transplant warm-season starts, and direct sow beans and squash by late March. Your last frost is typically early March.
Zone 8 March Overview
| Week | Direct Sow | Transplant |
|---|---|---|
| Early March | Peas, lettuce, carrots, beets | Tomatoes, peppers (with protection) |
| Mid March | Beans, squash, cucumbers | Tomatoes, peppers, eggplant |
| Late March | Corn, melons, okra | Squash, cucumbers |
Last frost date: March 1-15 (average for Zone 8) Soil temp in March: 55-65°F
Plant Outdoors Now
Zone 8 March is wide open. Get these in the ground:
Direct Sow Immediately
- Peas — Plant early March. They'll finish before heat arrives.
- Lettuce — Succession plant every 2 weeks through March.
- Spinach — Direct sow now. Will bolt by May.
- Carrots — Sow early March for June harvest.
- Beets — Direct sow, harvest in 60 days.
- Radishes — Fast 30-day crop. Plant weekly.
- Swiss chard — Heat tolerant, plant now.
Direct Sow Mid-Late March
- Beans — Wait for 60°F soil (usually mid-March).
- Squash — Direct sow after last frost.
- Cucumbers — Soil needs to be 60°F+.
- Corn — Plant in blocks for pollination.
- Okra — Loves heat, plant late March.
- Southern peas — Black-eyed peas, crowder peas.
Transplant Now
- Tomatoes — Transplant after last frost. Use wall-o-water if early March.
- Peppers — Need warm soil. Mid-March is safer.
- Eggplant — Transplant mid-late March.
- Broccoli/cabbage — Transplant early March. They need to mature before heat.
Cool-Season Urgency
These crops bolt (go to seed) when temps hit 80°F consistently:
- Lettuce
- Spinach
- Peas
- Broccoli
- Cabbage
- Cilantro
Plant them NOW. By April, your window closes. Zone 8 summers are too hot for cool-season crops.
Warm-Season Timing
| Crop | Earliest Safe Date | Ideal Date |
|---|---|---|
| Tomatoes | March 10 | March 15-20 |
| Peppers | March 15 | March 20-25 |
| Squash | March 15 | March 20 |
| Cucumbers | March 15 | March 20 |
| Beans | March 10 | March 15 |
| Corn | March 15 | March 20 |
| Melons | March 20 | March 25 |
March Tasks Checklist
Week 1:
- Direct sow peas, lettuce, spinach, carrots
- Transplant broccoli, cabbage, kale
- Add compost to beds
Week 2:
- Transplant tomatoes (with frost protection if needed)
- Direct sow beets, radishes, Swiss chard
- Set up tomato cages/stakes
Week 3:
- Transplant peppers, eggplant
- Direct sow beans, squash, cucumbers
- Succession plant lettuce
Week 4:
- Direct sow corn, okra, melons
- Final lettuce/spinach planting
- Mulch around transplants
Zone 8 March Advantages
- Long growing season — You can grow two crops in the same space.
- Early tomatoes — March transplants = June harvest.
- Fall garden prep — What you plant now clears space for fall crops.
Common Zone 8 March Mistakes
- Waiting too long for cool-season crops — They need to mature before heat. Plant immediately.
- Planting tomatoes too early — A late frost kills them. Watch the forecast.
- Forgetting succession planting — One lettuce planting = one harvest. Plant every 2 weeks.
- Skipping mulch — Zone 8 heats up fast. Mulch keeps roots cool and soil moist.
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Last updated: February 2026