An indeterminate tomato is a vine, not a bush. Treat it like a vine — train it tall, prune it right, and one plant out-produces three left to sprawl.
Determinate vs. indeterminate
- Determinate (bush types like Roma, Juliet) grow to a fixed size, fruit all at once, then stop. Cage them and leave them alone.
- Indeterminate (Cherokee Purple, Sungold, Brandywine) keep growing and fruiting until frost. These need support and pruning — this guide is for them.
The trellis
Indeterminates reach 6–8 feet by season's end. A 6-foot stake is the minimum; a wire trellis (two heavy posts every 8 feet, strung with twine at 12, 36, and 60 inches — the Florida weave) supports a whole row cheaply. Build it before planting so you don't spear roots later.
Pruning: the one move that matters
Snap off the suckers — the little shoots that grow in the crotch between the main stem and a branch. Keep one or two main stems; remove the rest weekly while they're small (a thumb-flick). Fewer stems means bigger fruit, better air flow, and earlier ripening. Unpruned vines make lots of leaves and few tomatoes.
Tie and train
Tie the stem to the trellis every 8–10 inches with soft twine or clips, looping loosely so the stem can thicken. Re-tie weekly. As the plant tops the trellis, you can let it drape, or cut the top to redirect energy into ripening fruit.
Water and feed
Tomatoes want deep, even moisture — inconsistent water causes blossom end rot and cracking. Mulch heavily. Feed lightly at planting, then a side-dress of compost when the first fruits set; too much nitrogen gives you leaves, not fruit.
Read the plant
Curled leaves in heat are normal. Yellow bottom leaves are normal as the plant ages. Cracked fruit means uneven water. Blossom end rot means calcium couldn't move — fix the water, not the calcium. The vine tells you what it needs; learn its language and you'll pick until frost.