Tomato plants reach full size in 6 to 8 weeks, but the timeline from seed to ripe fruit is 70 to 85 days

The answer depends on what you mean by "grown." If you want a plant large enough to flower and set fruit, expect 6 to 8 weeks from seed. If you want ripe tomatoes in your hand, plan for 70 to 85 days total — sometimes longer in cool climates or with slower varieties. The clock starts the day you plant the seed indoors or directly in soil.

Most home gardeners start seeds indoors 6 to 8 weeks before their last spring frost, then move seedlings outside when soil warms. From transplant day to first ripe fruit is usually 50 to 70 more days, depending on the variety, sunlight, and temperature. Determinate varieties (bush types) finish faster — often 60 to 70 days total. Indeterminate varieties (vining types) keep growing and producing all season, so they have no real "done" date.

Key Takeaways

  • Seeds germinate in 5 to 10 days indoors, and seedlings are ready to transplant outdoors in 6 to 8 weeks.
  • From transplant day to first ripe fruit is typically 50 to 70 days, depending on variety and growing conditions.
  • Determinate (bush) tomatoes finish in 60 to 70 days total; indeterminate (vining) types produce all season.
  • Temperature matters: tomatoes grow slower in cool weather and faster when soil and air stay between 70 and 85 degrees Fahrenheit.
  • Days to maturity printed on seed packets or plant labels is the count from transplant to ripe fruit, not from seed.

The seed-to-seedling stage takes 6 to 8 weeks indoors

Tomato seeds sprout in 5 to 10 days if kept warm — ideally 70 to 80 degrees Fahrenheit. Once they emerge, seedlings need strong light (a grow light or sunny window) and consistent moisture. They grow slowly at first, then faster as they develop their first true leaves.

By week 4 or 5, seedlings are usually 2 to 3 inches tall and ready to be moved into larger containers if they are crowded. By week 6 to 8, they should be 6 to 10 inches tall, sturdy, and have several sets of true leaves. This is the right size to transplant outdoors — after your last frost date and when soil temperature reaches at least 60 degrees Fahrenheit.

From transplant to flowering takes 2 to 4 weeks

Once you move seedlings outside, they spend the first 2 to 4 weeks establishing roots and growing taller. During this time, the plant is not yet flowering. Growth speed depends on temperature, sunlight, and soil quality. Plants in full sun (at least 6 to 8 hours daily) and warm soil grow faster than those in shade or cool conditions.

Pinching off the bottom leaves once the plant is established can speed up flowering slightly by directing energy upward. Consistent watering and moderate nitrogen fertilizer support leaf growth during this phase. Once the plant reaches 12 to 18 inches tall, flower buds usually appear.

Flowering to fruit set happens in 1 to 2 weeks

Tomato flowers open and close quickly. Pollination happens when bees visit or when you shake the plant gently by hand. Once pollinated, the flower falls away and a small green fruit begins to form at the base.

Not every flower sets fruit — some drop if temperatures are too hot (above 90 degrees), too cold (below 55 degrees at night), or if the plant is stressed by drought or disease. A healthy plant in good conditions will set fruit on most flowers. Once fruit appears, it grows steadily but is still green and inedible.

Green fruit to ripe tomato takes 20 to 30 days

After fruit sets, it grows larger for 2 to 3 weeks while still green. Then it begins to change color — first a pale yellow or orange blush, then deeper red (or yellow, pink, or orange depending on variety). This color change is the ripening phase and takes another 1 to 2 weeks.

Ripening slows in cool weather. If nighttime temperatures drop below 65 degrees Fahrenheit, tomatoes ripen much more slowly or stop ripening altogether. In hot climates, ripening can happen faster. A ripe tomato yields slightly to gentle pressure and smells fragrant at the stem end.

Variety and climate change the total timeline

Seed packets and plant labels list "days to maturity" — this is the count from transplant day to ripe fruit, not from seed. Early varieties mature in 50 to 60 days. Mid-season varieties take 65 to 75 days. Late varieties need 80 to 90 days or more. In short-season climates, choose early or mid-season varieties to harvest before frost.

Temperature is the biggest variable. Tomatoes grow fastest when daytime temperatures are 70 to 85 degrees Fahrenheit and nighttime temperatures stay above 60 degrees. Cool springs delay everything. A late frost that kills seedlings sets you back 6 to 8 weeks. A hot, dry summer can speed ripening but may reduce fruit quality.

Determinate versus indeterminate growth patterns

Determinate (bush) tomatoes grow to a fixed height — usually 3 to 4 feet — then stop. They flower and fruit all at once, ripen most of their crop within 2 to 3 weeks, and then decline. Total time from seed to last ripe fruit is 60 to 75 days. These are ideal for canning or sauce-making because the harvest is concentrated.

Indeterminate (vining) tomatoes keep growing taller all season and produce flowers and fruit continuously until frost kills the plant. They have no fixed maturity date. The first fruit ripens in 70 to 85 days, but the plant keeps producing new fruit for months. These are better for fresh eating and salads because you harvest a few ripe tomatoes at a time over a long period.

How to speed up growth and ripening

Start seeds indoors early so transplants are large and strong when they go outside. Choose a planting spot with full sun — at least 8 hours daily. Warm the soil before planting by laying black plastic mulch for a week or two. Transplant seedlings deep, burying the stem up to the lowest leaves; buried stem sections develop roots and create a stronger plant.

Water consistently and deeply rather than daily and shallow — this encourages deep roots and steadier growth. Use a balanced or slightly low-nitrogen fertilizer once flowers appear; too much nitrogen delays flowering. Prune suckers (shoots that grow between the main stem and branches) on indeterminate varieties to direct energy into fruit rather than extra foliage. In cool climates, use row covers or cloches early in the season to trap heat around young plants.

Frequently Asked Questions

Can I harvest tomatoes before they are fully ripe?

Yes. Tomatoes picked at the "breaker stage" — when they show the first blush of color — will ripen indoors at room temperature in 3 to 5 days. This is useful if frost is coming or if you want to protect fruit from birds or pests. Tomatoes picked completely green will not ripen properly indoors.

Why are my tomato flowers dropping without setting fruit?

Flower drop happens when nighttime temperatures fall below 55 degrees Fahrenheit or rise above 90 degrees, when the plant is drought-stressed, or when nitrogen fertilizer is too high. Consistent watering and waiting for warmer weather usually solves the problem. Hand-pollinating flowers with a small brush can help in cool springs.

How long do tomato plants live?

Tomatoes are annuals in most climates — they live one growing season and die at the first frost. In frost-free climates, indeterminate varieties can live for years if pruned and maintained. Most gardeners replant each spring because older plants become woody and less productive.

Do tomatoes ripen faster in the sun or shade?

Full sun speeds both growth and ripening. Tomatoes need at least 6 to 8 hours of direct sunlight daily to produce fruit. In very hot climates, afternoon shade can prevent sunscald on fruit, but this slows ripening slightly. Shade below 6 hours daily usually results in few or no ripe tomatoes.

What is the difference between "days to maturity" on a seed packet and actual growing time?

Days to maturity counts only from transplant day to ripe fruit, not from seed. If a packet says 70 days, add 6 to 8 weeks for the indoor seedling stage to get the total time from seed to harvest. This is why starting seeds indoors early is important in short-season climates.