Plant cherry tomatoes after your last spring frost, when soil reaches 60°F

Cherry tomatoes need warmth to grow. Plant them outdoors only after the danger of frost has passed in your area — typically four to six weeks after your region's last spring frost date. Soil temperature matters as much as air temperature: seeds and seedlings planted into cold soil will sit dormant and rot rather than sprout. Wait until soil reaches at least 60°F, ideally 65°F or warmer.

You can start seeds indoors six to eight weeks before your last frost date, then move seedlings outside once conditions warm up. This gives you a head start on the growing season without risking the plants to cold soil. If you are buying seedlings from a nursery, harden them off — leave them outside in a sheltered spot for a few days before planting — so they adjust to outdoor conditions gradually.

Key Takeaways

  • Cherry tomatoes planted outdoors should go in the ground four to six weeks after your region's last spring frost date, when soil temperature reaches 60°F or higher.
  • Starting seeds indoors six to eight weeks before your last frost date lets you transplant seedlings outside once soil warms, giving you earlier fruit without frost damage.
  • Cherry tomatoes need six to eight hours of direct sunlight daily and soil that drains well; standing water causes root rot.
  • Space plants 24 to 36 inches apart so air circulates between them, which reduces disease and keeps fruit from touching the ground.
  • Fruit typically appears 60 to 85 days after planting, depending on variety and growing conditions.

Finding your last frost date and checking soil temperature

Your last spring frost date is the average date of the final frost in your area. The USDA Hardiness Zone Map and local cooperative extension offices list this date by zip code or county. Search "[your state] cooperative extension" plus "last frost date" to find the office for your region — they maintain records specific to your location and can tell you the exact date.

Soil temperature is separate from air temperature. A soil thermometer costs $10 to $20 and takes the guesswork out of planting. Push it 4 inches into the ground in the spot where you plan to plant, wait five minutes, and read the temperature. If it is below 60°F, wait another week or two and test again. You can also feel the soil: if it is still cold and damp to the touch, it is not ready.

Choosing a planting location with enough light and drainage

Cherry tomatoes need six to eight hours of direct sunlight daily — more is better. A spot that gets morning sun and afternoon shade works in very hot climates, but in most regions, full sun produces the sweetest fruit and the most of it. Avoid planting near trees or structures that cast shade as the season progresses.

Soil must drain well. If water pools on top after rain or watering, the roots will rot. If your soil is heavy clay, mix in compost or aged manure before planting to improve drainage. Raised beds or containers work well if your yard stays wet. Cherry tomatoes are shallow-rooted compared to large slicing tomatoes, so they can grow in containers at least 5 gallons in size.

Spacing plants and supporting growth

Space cherry tomato plants 24 to 36 inches apart. Crowding them reduces air circulation, which traps moisture and invites fungal disease. Wider spacing also keeps fruit from touching the ground, where it can rot or attract pests.

Most cherry tomato varieties grow as indeterminate plants — they keep growing taller throughout the season and produce fruit continuously until frost. Install a cage, stake, or trellis at planting time so you do not damage roots later. Determinate varieties (which grow to a fixed size and produce most fruit at once) need less support but are less common in cherry tomatoes. Check the seed packet or plant label to see which type you have.

Watering and feeding after planting

Water deeply after planting so soil settles around the roots. For the first week, keep soil consistently moist but not waterlogged. Once plants are established, water deeply one to two times per week depending on rainfall and heat. Consistent watering prevents problems like blossom-end rot and fruit cracking.

Cherry tomatoes are moderate feeders. Work compost or balanced fertilizer into the soil before planting. Once plants flower, side-dress with compost or use a balanced liquid fertilizer every two to three weeks. Too much nitrogen produces leafy plants with few flowers and little fruit.

When to expect fruit and how to extend the season

Most cherry tomato varieties produce ripe fruit 60 to 85 days after planting, though some fast varieties fruit in as little as 50 days. Check the seed packet for the specific variety's days to maturity. Fruit appears in clusters and ripens gradually over several weeks, so you will harvest continuously rather than all at once.

To extend the harvest into fall, prune suckers (shoots that grow between the main stem and branches) on indeterminate varieties in mid-summer. This directs energy into ripening existing fruit rather than growing new branches. Stop fertilizing in late summer so the plant focuses on finishing fruit before frost arrives. In most regions, the first frost kills the plant, but you can pick green fruit and ripen it indoors on a windowsill.

Frequently Asked Questions

Can I plant cherry tomatoes before the last frost date if I use row covers?

Row covers protect seedlings from frost, but cold soil still slows growth and can cause rot. Wait until soil temperature reaches 60°F, then use row covers if a late frost is forecast. Covers work best as short-term frost protection, not as a way to plant weeks early.

What if my area does not have a clear last frost date?

Contact your local cooperative extension office — they have frost date data even for areas with variable weather. If you cannot reach them, plant when nighttime temperatures stay above 50°F consistently for at least a week, and soil feels warm to the touch.

Do I need to harden off seedlings I started indoors?

Yes. Seedlings grown indoors are tender and sunburned easily. Place them outside in a sheltered, shaded spot for two to three hours the first day, then gradually increase time and sun exposure over a week before planting them in the ground.

Can I plant cherry tomatoes in containers instead of the ground?

Yes. Use a container at least 5 gallons in size with drainage holes, fill it with potting soil (not garden soil), and follow the same planting timeline. Containers warm up faster than ground soil in spring, so you may be able to plant a week or two earlier.

What happens if I plant too early and frost kills the seedlings?

The plants die. You will need to replant once soil warms again. It is better to wait and plant once, rather than replant after a frost. If an unexpected frost is forecast after you have planted, cover plants with blankets or row covers overnight.