
Ipomoea batatas
A tender, warm-growing crop for UK gardens, grown from slips rather than true seed. It needs a long, frost-free season, light soil, and plenty of warmth to bulk up properly.
Step-by-step instructions for growing Sweet Potato
Place slips in trays of moist compost at 20th February - 6th March and keep them warm and bright. Pot them on once roots show and shoots are growing strongly.
Move each rooted slip into a small pot once the roots fill the starter compost. Keep the compost just moist and give them plenty of light so they do not go leggy.
Acclimatise the plants gradually for 1st May - 15th May by moving them outside for longer each day. Keep them under fleece or in a cold frame at night if temperatures dip.
Set the plants in their final position once the soil is warm and all frost risk has passed. Space them apart, water in thoroughly straight away, and use cloches or fleece early on if nights are cool.
As growth spreads from 11th June, tuck stray stems back into the row and keep weeds down around the plants. Avoid heavy feeding, as that pushes foliage rather than tubers.
Lift a sample tuber from 17th September once the plants have had enough warm growing time. Harvest the main crop through 23rd October before frost damages the foliage, and handle the tubers carefully because their skins bruise easily.
Tap a plant to see why it works (or doesn't) with Sweet Potato.
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 Sweet Potato to consider
A well-known orange-fleshed type that can crop reliably in a warm UK summer under cover or in a sheltered bed.
A popular orange-fleshed variety that suits UK growers looking for a dependable, early-ish crop.
A sweeter orange-fleshed variety that can do well in a long, warm season.
A pale-fleshed variety often grown in the UK for a slightly lighter flavour and decent yields.
See how Sweet Potato timing shifts in other towns with different frost dates.