🍅When to Plant Tomato (2026)
The backyard favorite. Start indoors and transplant after all danger of frost.
- Type: Warm-season
- Method: Transplant
- Days to harvest: 75
- Spacing: 24" apart
- Sun: Full sun (6-8h)
- Companions: basil, carrot, marigold
Is Tomato right for your USDA zone?
Tomato is a warm-season crop that needs frost-free weather and warm soil to thrive. Gardeners in zones 5b through 10b have the longest tomato season. In cooler zones (3a-5a), choose fast-maturing varieties (65 days or less) and start seeds indoors to extend your window. In hot zones (9a-10b), tomato may struggle in peak summer — consider planting in February-March for a spring crop before the heat.
Tomato needs about 75 days from transplant to harvest, so any zone with at least 89frost-free days can grow it successfully. Check your zone's specific dates in the table below.
How to grow tomato
Start tomato seeds indoors about 6 weeks before your last spring frost, then harden off and transplant the seedlings once frost danger has passed. Give each plant 24 inches of room in full sun (6-8h), and keep the soil consistently moist while seeds germinate and plants establish.
Expect roughly 75 days to your first harvest. Watch for hornworm, blight, aphids, the most common pests of tomato, and scout plants weekly so you can act early. Deep planting builds stronger roots—bury 2/3 of the stem when transplanting tomatoes.
Troubleshooting tomato
Blossom end rot appears as dark sunken spots on fruit bottom, caused by calcium deficiency and inconsistent watering. Mulch to keep soil moisture even and avoid high-nitrogen fertilizers during fruiting.
Growing tomato in containers
Needs at least a 5-gallon container per plant. Determinate (bush) varieties like Roma perform best in pots. Use a sturdy cage or stake—container tomatoes still grow 3-5 feet tall.
Tomato planting dates by zone (2026)
| Zone | Start Indoors | Sow / Transplant | Harvest From |
|---|---|---|---|
| Zone 3a | Apr 3 | May 22 | Aug 5 |
| Zone 3b | Apr 3 | May 22 | Aug 5 |
| Zone 4a | Mar 29 | May 17 | Jul 31 |
| Zone 4b | Mar 24 | May 12 | Jul 26 |
| Zone 5a | Mar 19 | May 7 | Jul 21 |
| Zone 5b | Mar 14 | May 2 | Jul 16 |
| Zone 6a | Mar 9 | Apr 27 | Jul 11 |
| Zone 6b | Mar 4 | Apr 22 | Jul 6 |
| Zone 7a | Feb 27 | Apr 17 | Jul 1 |
| Zone 7b | Feb 22 | Apr 12 | Jun 26 |
| Zone 8a | Feb 11 | Apr 1 | Jun 15 |
| Zone 8b | Feb 1 | Mar 22 | Jun 5 |
| Zone 9a | Jan 14 | Mar 4 | May 18 |
| Zone 9b | Dec 30 | Feb 17 | May 3 |
| Zone 10a | Dec 20 | Feb 7 | Apr 23 |
| Zone 10b | Dec 4 | Jan 22 | Apr 7 |
Tomato planting FAQ
When is the best time to plant tomato?
Tomato is a warm-season crop. Plant it only after all danger of frost has passed and the soil has warmed to at least 60°F. Find the exact date for your USDA zone in the table below.
How long does tomato take to grow?
Tomato takes about 75 days from transplant to first harvest. Starting seeds indoors 6 weeks before your last frost gives the plants a head start.
How far apart should I space tomato?
Space tomato about 24 inches apart in full sun (6-8h). Proper spacing gives roots room to spread and improves airflow, which reduces disease.
What is the best growing tip for tomato?
Deep planting builds stronger roots—bury 2/3 of the stem when transplanting tomatoes.
What are common problems with tomato?
Blossom end rot appears as dark sunken spots on fruit bottom, caused by calcium deficiency and inconsistent watering. Mulch to keep soil moisture even and avoid high-nitrogen fertilizers during fruiting.
Can I grow tomato in a container?
Needs at least a 5-gallon container per plant. Determinate (bush) varieties like Roma perform best in pots. Use a sturdy cage or stake—container tomatoes still grow 3-5 feet tall.
Can I plant tomato for a second harvest?
Yes—in zones 6 and warmer, plant a second round of fast-maturing varieties (60-day) in early to mid-July for a fall harvest before first frost.
What grows well with tomato?
Good companion plants for tomato are basil, carrot, marigold. Companion planting can deter pests and make better use of garden space. Rotate where you plant tomato each year to keep soil healthy.