Gadenin日本語Get the appA stocky transplant beats a big one
Cherry tomatoes are naturally vigorous, so you are not looking for a big plant at the garden center. You are looking for a compact one. The gaps between leaf joints should be short, roughly an inch and a half (four cm), and the stem should feel stiff rather than springy when you tilt the pot. A tall plant with long internodes was raised warm and dark, and it will spend its first month recovering rather than growing roots.
Buds on the first truss are a bonus, not a requirement. Cherry types set fruit far more readily than slicing tomatoes and will flower within two or three weeks of going out regardless. What you cannot fix later is a weak root system, so turn the pot over and look: white roots circling the base are what you want, and a solid mat of tan roots plugging the drainage hole means the plant has been in that pot a month too long.
- Squeeze the stem just below the tip It should resist. A stem you can flatten between finger and thumb is soft growth and will snap at the first windy afternoon after planting.
- Count the leaf joints Six to eight true leaves on a plant under ten inches (25 cm) tall is the ideal ratio. The same leaf count on a fourteen inch plant means it was grown too fast.
- Tease the bottom of the rootball If roots are circling, pull the outer half inch (1 cm) loose with your fingers before planting. Left alone they keep circling and the plant stays in the shape of the pot all season.
If a transplant has already set fruit in a small pot, pick the fruit off before you plant it. Carrying fruit while trying to root is how a plant stalls for a fortnight.
Wait for the soil, not the calendar
Cherry tomatoes are no more cold-tolerant than any other tomato. Root growth effectively stops below 60F (15C), and a plant set into cold ground sits sulking with purple stems while a plant set out two weeks later catches it up and passes it. Wait until the last frost has passed and the soil at four inches (10 cm) deep holds above 60F (15C) through the morning.
Because cherry tomatoes crop over such a long window, a late start costs you less than it would with a beefsteak. A single healthy cherry plant will still give you fruit for three months if it goes out into warm ground. Rushing it into cold soil to gain a week regularly costs you a month.
| Soil temperature at 4 in (10 cm) | What the plant does | Decision |
|---|---|---|
| Below 55F (13C) | Roots dormant, stems go purple | Do not plant. Pot the transplant on instead |
| 55 to 60F (13 to 15C) | Slow, grudging root growth | Only under black plastic or cloche |
| 60 to 68F (15 to 20C) | Roots move within a week | Plant out. This is the window |
| Above 70F (21C) | Fast establishment, some transplant shock | Plant in the evening and shade for two days |
Bury the stem deep and sideways
Tomato stems root along their whole buried length, and cherry types do it especially fast because they are so vigorous. Lay the plant into a sloping trench and bury everything up to the lowest pair of remaining leaves. On a plant that came out of the pot at ten inches (25 cm), you can easily bury six of those inches (15 cm) and end up with three times the root system by midsummer.
This matters more for cherry tomatoes than for large-fruited types because of the sheer number of fruit they carry. A plant holding two hundred fruit at once needs a root system that can keep up with the water demand on a hot afternoon, and the difference between a shallow-planted and a trench-planted cherry tomato in a heatwave is the difference between wilting at noon and not wilting at all.
- Strip every leaf that will go underground Pinch them off cleanly at the stem. A buried leaf rots, and rot at the base of a young stem can kill the plant outright in wet ground.
- Dig a shallow trench, not a deep hole Four to five inches (10 to 12 cm) deep is plenty. Deeper than that and the buried stem sits in cold soil where it rots instead of rooting.
- Curve the tip upwards Lay the stem along the trench and bend the top gently upright before you backfill. It will straighten itself within three days as it grows towards the light.
- Water once, hard, then leave it Half a gallon (two liters) at the base settles the soil around the stem. Then do not water again until the surface has dried, or the buried stem rots.
Spacing, and why cherry tomatoes need more of it
A cherry tomato grown on a single stem still needs 20 inches (50 cm) between plants, and if you intend to run two stems, which is the more productive way with cherry types, allow 30 inches (75 cm). They branch harder and hold more leaf than a slicing tomato, and a crowded row stays wet after rain for hours longer than a spaced one.
Give yourself room to reach in as well. Picking cherry tomatoes is a job you do two or three times a week for three months, working through trusses that carry twenty or thirty fruit at different stages of ripeness. A row you can only reach from one side turns picking into a chore, and fruit you cannot reach splits and rots on the plant.
Containers: the compost volume is the whole game
Cherry tomatoes are the best tomato for containers because they set fruit readily under stress, but they are also the thirstiest, and the number that decides your summer is the volume of compost, not the width of the pot. Below about five gallons (20 liters) you are committing to watering twice a day from midsummer onwards, and the moisture swings that come with that bring on splitting.
Use a pot at least 14 inches (35 cm) across and 14 inches deep, filled with a soil-based compost rather than a pure peat or coir mix. Soil-based compost holds water more evenly and does not shrink away from the sides of the pot when it dries, which is what causes water to run straight down the gap and out of the drainage holes without wetting the rootball at all.
| Container | Compost volume | Summer watering |
|---|---|---|
| 10 in (25 cm) pot | About 2 gallons (8 L) | Twice daily. Expect splitting and small fruit |
| 14 in (35 cm) pot | 5 to 6 gallons (20 to 24 L) | Once daily, twice in a heatwave |
| Half barrel or deep trough | 10 gallons (40 L) and up | Once daily. The most forgiving option |
| Hanging basket | Under 2 gallons (8 L) | Only for trailing types, and water twice daily |
Write down the day you planted
Note the planting date, the position of each plant in the bed, and the soil temperature if you took it. Cherry tomatoes crop for so long that by the end of the season you will genuinely not remember whether the plant at the end of the row went in a week before the others or a week after, and that is exactly the comparison that teaches you your own garden.
Record where each plant sat, too. Soil-borne wilt shows up in the same spot year after year, and a sketch of the row with dates on it is the only thing that will tell you, three seasons from now, that the corner by the fence has taken out a plant every single year.
- Log the date and the spot Planting date plus a rough position for each plant. Two minutes now saves an hour of guessing next spring.
- Photograph the row on planting day One picture of the whole bed gives you spacing, stake height and plant size in a form you can actually compare against next year.