Crop guide
How to grow tomatoes
Growing tomatoes means matching plants to your frost window, giving them sun and even soil moisture, supporting vines before they flop, and recording what actually happened in your bed. Cultivar, weather, and soil change the timing. There is no single trick or national planting date. Start seed indoors where seasons are short; set plants out after frost risk has passed at your site. Compare leaf problems on this site; do not treat a photo as a diagnosis.
Growing guidance is general information. Timing, spacing, and care depend on cultivar, weather, soil, and local conditions. Check the sources and adjust the plan for your garden.
Steps (range, not a promise)
- 01Know your window. Plant after your last spring frost outdoors; start seed indoors earlier. See when to plant tomatoes.
- 02Choose a sunny bed. Full sun is the usual target; shade shortens the season.
- 03Set plants with space to air out. Crowding holds moisture on leaves.
- 04Water the soil, not a schedule slogan. See tomato plant care.
- 05Support early. Cages or trellis before plants flop.
- 06Watch the plant, not a diagnosis app. If leaves curl or yellow, compare signs: leaves curling, yellow leaves.
- 07Log harvest. Count or weight on the bed card so next year is not a guess. See when to harvest tomatoes.
Start seed indoors where seasons are short.
The season, on your ground
Save this bed — freeWhen to plantCareWhen to harvestFertilizerCompanion planting
If leaves look wrong
These links are comparisons, not a confirmed cause: curling · yellowing · blossom drop · cracking.
Leaves curlingLeaves turning yellowBlossoms falling offFruit crackingTomato pestsTomato hornwormPruning and stakingGarden pests
Types of tomatoesBeefsteak tomatoesCherry tomatoesGrape tomatoesRomaSan MarzanoCherokee PurpleBrandywineBlack KrimCelebrity
What the sources say — at a glance
One source per card. Facts are not averaged.
UNH Extension (New Hampshire)
Staked or caged plants 18–24 inches in-row with rows at least 5 feet apart; soil pH 6.2–6.8; container-level transplant set; one plant per 4–5 gallon container with drainage.
Details and limits (8)
Spacing
Staked/caged plants 18–24 inches in-row, rows at least 5 feet.
Spacing
Unstaked determinate plants 12–24 inches apart, rows 4–6 feet; unstaked indeterminate 2–3 feet apart, rows 5–7 feet.
Soil pH
6.2–6.8 on their tomato sheet — not a soil-test prescription.
Transplant
Container-level set on their sheet.
Habit
Indeterminate varieties continue to grow, flower, and set fruit through the season. Habit description only — not a harvest or yield promise.
Container
One plant per four- or five-gallon container with drainage. Cited context, not a BioArva pot size.
Container
Artificial potting mix distinguished from regular garden topsoil or homemade compost. Cited media distinction — not a product SKU and not a BioArva mix recipe.
Limit
New Hampshire sheet only. Not blended with other spacing, pH, or transplant notes.
Cornell (New York)
14–20 inches for staked indeterminate plants; at least 8 hours of direct sun; cages described as a compromise between staking and letting plants sprawl; deep-set transplants.
Details and limits (8)
Spacing
14–20 inches for staked indeterminate plants.
Sun
At least 8 hours of direct sun daily.
Transplant
Deep-set plants on their sheet.
Habit
Determinate varieties do not need staking. Source-specific note, not a BioArva instruction.
Support
Growing tomatoes in cages is described as a compromise between labor-intensive staking and letting plants sprawl. Method comparison, not a ranking.
Hardware
Wooden tomato stakes typically about 6 feet long and 1½ inches square; drive them at least 8 to 10 inches deep at or soon after transplanting. Hardware note, not a SKU.
Container
Compact varieties as choices for containers. Not a ranking of cultivars.
Limit
New York guide only. Sun hours and spacing are not averaged with Iowa State or UNH.
Iowa State Extension (Iowa)
At least 6 hours of direct sun; soil pH 6.0–6.8; staked indeterminate 1.5–2 feet in-row and cages 2–3 feet; deep-set plants.
Details and limits (6)
Sun
At least 6 hours of direct sun daily.
Spacing
Staked indeterminate plants 1.5–2 feet apart in the row; wire cages 2–3 feet apart.
Soil
Tomatoes can be grown in many soil types; their sheet names deep, loamy, well-drained soils. Growing-condition note — not a soil-test band and not a pH prescription.
Soil pH
6.0–6.8 on their crop sheet — not the general soil-test tool.
Transplant
Deep-set plants on their sheet.
Limit
Iowa sheet only. Six-hour sun is not averaged with Cornell’s eight-hour note.
Clemson HGIC 1323 (South Carolina)
pH 6.0–6.5; plants 24 inches apart on 3-foot rows; cages with horizontal wires at least 6 inches apart; stakes tied every 10 inches; deep-set transplants.
Details and limits (6)
Spacing
Space plants 24 inches apart on rows that are 3 feet apart.
Soil pH
6.0–6.5 on their tomato sheet — not a soil-test prescription.
Transplant
Deep-set plants on their sheet.
Hardware
Cages should have at least 6-inch spacing between the wires so a hand can reach fruit. Hardware note, not a SKU.
Hardware
Wooden stakes 6 feet tall and 1½ or 2 inches wide; they attach stems to the stake at every 10 inches of height. Hardware note, not a SKU.
Limit
South Carolina sheet only. Spacing is not averaged with UNH, Cornell, PSU, or Iowa State.
Penn State Extension (Pennsylvania)
Space determinate varieties 2 feet apart, 3 feet for indeterminate; 2- or 3-foot vs about 5-foot supports; stakes 3–4 inches from the stem at planting.
Details and limits (4)
Spacing
Space determinate varieties 2 feet apart, 3 feet for indeterminate.
Support
Determinate plants — 2- or 3-foot supports; indeterminate — around 5 feet. Cited context, not a hardware SKU.
Hardware
Insert stakes 3–4 inches from the stem at planting; stakes at least 1½ inches in diameter, 6 feet tall, and pounded 12 inches into the ground. Hardware note, not a SKU.
Limit
Pennsylvania sheet only. Spacing is not averaged with UNH, Cornell, Iowa State, or Clemson.
Maryland Extension (Maryland)
Determinate cultivars stop at a set height; indeterminate vines continue until frost or disease. Maryland also lists supported cages and compact varieties for containers.
Details and limits (7)
Habit
Determinate cultivars stop growth at a certain height.
Habit
Indeterminate vines continue until frost or disease stops them.
Spacing
Space cages at least 4 feet apart and secure them to the ground with stakes. Cited spacing, not a BioArva average.
Support
Wire cages require a larger initial expenditure and storage. They also note cages as an alternative to pruning and staking. Cost/labor note, not a yield claim.
Container
Midget, patio, or dwarf varieties with compact vines are listed for hanging baskets or other containers. Not a cultivar ranking.
Hardware
Staking uses wooden or steel stakes 6 to 8 feet long and 1½ to 2 inches wide. Hardware note, not a SKU.
Limit
Maryland home-garden tomato page only.
UGA C1089 (Georgia)
When possible, space cages to allow several feet between plants. Spacing note — not a diagnosis.
Details and limits (2)
Spacing
When possible, space cages to allow several feet between plants. Spacing note — not a diagnosis.
Limit
Georgia publication only. Not averaged with other cage-spacing notes.
Arizona Extension (Arizona)
Indeterminate plants sprawl and are supported by cages or stakes; determinate plants can grow in containers with support.
Details and limits (3)
Habit
Indeterminate plants as sprawling and supported by cages or stakes. Habit/support note — not a ranking and not a yield claim.
Container
Determinate plants as growable in containers on patios or in small garden spaces with support. Source-specific; not a BioArva pot ranking.
Limit
Arizona sheet only.
Make it yours
Save the bed in the Field Book so next season is not a guess.
Sources differ
Sources differ
Set plants out after frost risk has passed at your site. See when to plant tomatoes.
What to record in the Field Book
Save the bed with the crop and the date. You may add a photo and notes. Compare entries you have recorded with each other — not with a diagnosis from this page. If you want an identification, bring the record to local Extension.
Is there one trick to growing tomatoes?
No. Cultivar, weather, and soil change the timing. There is no single trick or national planting date. Match plants to your frost window, even moisture, support, and a record of what happened in your bed. Sources for spacing and sun are listed below as separate assertions, not a BioArva average.
Do tomatoes grow better in containers or in the ground?
Either can work. Ground beds usually hold more even moisture and root room; containers need closer watering checks and a large enough pot. Choose by your site, not a ranking. Save the bed so next year is not a guess.
Verified suppliers only
No supplier on this page
When a partner is listed, it will be outbound and disclosed. Nothing to buy here. Fertilizer, soils, and pesticides stay off this slot.
How we know — methodology. Ranges and assertions are cited per source, not blended.