
Physalis philadelphica
A tender, bushy crop that needs a long, warm season in the UK. Start seed indoors, plant out only after frost risk has passed, and give plants a sunny, sheltered spot with support for the spreading stems. Tomatillos crop best with at least two plants for good pollination and steady moisture.
Step-by-step instructions for growing Tomatillo
Sow seeds in warm compost at 1st March - 16th March, about deep. Keep them at in a propagator or on a warm windowsill, and keep the compost just moist.
Move seedlings on once the first true leaves appear, usually from 22nd March. Handle them by the leaves, not the stem, and pot each one into its own small pot so roots can spread.
Pot plants into larger pots from 5th April as roots fill the smaller ones. Keep them growing steadily with bright light and even moisture, and turn the pots now and then so the plants grow straight.
Begin hardening off from 1st April and finish by 15th April. Stand plants outside for a few hours at a time, out of cold wind and hard sun, then bring them back in at night until they are properly acclimatised.
Plant out from 6th May once the soil is warm and the last frost has passed. Space plants apart, water in thoroughly straight away, and use cloches or fleece if cold nights are still forecast.
Set in short canes or stakes from 23rd May and tie stems loosely as they grow. Tomatillos are bushy rather than cordon plants, so give them support without pinching out the growing tip.
Start feeding from 23rd May once plants are settled, then repeat every 14 days. Use a high-potash tomato feed, water deeply in dry spells, and keep the root area evenly moist rather than letting it dry out and flood.
Pick fruits from 28th July as the husks dry and the fruit fills out. Harvest right through to 7th October, checking every few days, and collect windfalls as well because ripe tomatillos drop easily.
Tap a plant to see why it works (or doesn't) with Tomatillo.
Companion planting can deter pests, improve pollination, and make better use of space. Some plants confuse pests or attract beneficial insects; others improve soil or offer shade to neighbours that need it.
Popular varieties of Tomatillo to consider
A widely grown green-fruited tomatillo that crops well in a good UK summer.
Yellow-fruited type with a milder flavour and reliable fruit set in warm conditions.
An attractive purple-fruited type with a slightly sweeter flavour when fully ripe.
See how Tomatillo timing shifts in other towns with different frost dates.