How to Grow Tomatoes
Solanum lycopersicum
The most popular home garden crop — warm-season, sun-loving, and endlessly rewarding.
About tomatoes
Tomatoes are the crown jewel of the summer vegetable garden, prized for flavor that store-bought fruit can never match. They are warm-season plants that thrive in full sun and rich, evenly moist soil. With a little support and consistent watering, a few plants can produce pounds of fruit from midsummer until frost.
When to plant and harvest tomatoes
Timing is relative to your frost dates. Find your USDA zone for exact dates, or browse the month-by-month calendars.
Start seeds indoors
6–8 weeks before your last frost
Transplant outdoors
1–2 weeks after last frost, once nights stay above 50°F
Direct sow
Not recommended in most zones — start indoors
Harvest
Midsummer until first frost
How to grow tomatoes step by step
- 1
Start seeds indoors ¼ in deep at 70–75°F under bright light 6–8 weeks before your last frost.
- 2
Pot up seedlings once they have two sets of true leaves to build strong roots.
- 3
Harden off over 7–10 days, then transplant after the last frost, burying two-thirds of the stem to root along the buried portion.
- 4
Stake or cage at planting time; pinch suckers on indeterminate types for larger fruit.
- 5
Water deeply and evenly at the base, and mulch to keep soil moisture steady.
- 6
Feed with a balanced fertilizer at planting, then switch to lower-nitrogen feed once flowering begins.
Common problems growing tomatoes
⚠ Blossom-end rot (black sunken bottoms)
Caused by inconsistent watering and calcium uptake — mulch and water evenly; avoid letting soil dry out.
⚠ Cracking fruit
From irregular watering after dry spells — keep moisture steady and mulch.
⚠ Leaf spots / early blight
Water at the base, space for airflow, and remove lower leaves touching the soil.
⚠ Tomato hornworms
Hand-pick the large green caterpillars at dusk; they strip foliage fast.
✗ Keep away from
🧺 Harvesting tomatoes
Pick when fruit is fully colored but still firm, harvesting every 2–3 days. Vine-ripened fruit has the best flavor; ripen the last green tomatoes indoors before frost.
Tomatoes: frequently asked questions
How much sun do tomatoes need?＋
At least 6–8 hours of direct sun a day. More sun means more fruit and better flavor.
Why are my tomato leaves curling?＋
Usually heat or water stress, which is harmless. If accompanied by yellowing and stunting, it may be a virus — remove affected plants.
Grow tomatoes in your zone
See exactly when to plant and what else to grow alongside tomatoes, tailored to your USDA hardiness zone.
