Sweet Potatoes in Gabhsann bho Thuath

Ipomoea batatas

Sweet Potato
Sweet Potato · 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.

30 cm · Full Sun · Moderate Water

Calibrated to Gabhsann bho Thuath · last frost ≈ 12 May

Sow indoors March, plant out June to July, harvest October. Frost risk October to May.
ActivityJanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember
Sow indoorsNoNoYesNoNoNoNoNoNoNoNoNo
Plant outNoNoNoNoNoYesYesNoNoNoNoNo
HarvestNoNoNoNoNoNoNoNoNoYesNoNo

Growing guide

Step-by-step instructions for growing Sweet Potato

  1. 01

    Root Slips

    17 Mar to 31 Mar

    Place slips in trays of moist compost at 17th March - 31st March and keep them warm and bright. Pot them on once roots show and shoots are growing strongly.

  2. 02

    Pot On Young Plants

    7 Apr to 21 Apr

    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.

  3. 03

    Harden Off

    26 May to 9 Jun

    Acclimatise the plants gradually for 26th May - 9th June by moving them outside for longer each day. Keep them under fleece or in a cold frame at night if temperatures dip.

  4. 04

    Plant Out

    2 Jun to 12 Jul

    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.

  5. 05

    Train Runners

    6 Jul to 31 Aug

    As growth spreads from 6th July, tuck stray stems back into the row and keep weeds down around the plants. Avoid heavy feeding, as that pushes foliage rather than tubers.

  6. 06

    Harvest Tubers

    12 Oct to 22 Oct

    Lift a sample tuber from 12th October once the plants have had enough warm growing time. Harvest the main crop through 22nd October before frost damages the foliage, and handle the tubers carefully because their skins bruise easily.

Companion plants

Tap a plant to see why it works (or doesn't) with Sweet Potato.

Plants to avoid

Why companion planting matters

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.

Suggested varieties

Popular varieties of Sweet Potato to consider

Beauregard

A well-known orange-fleshed type that can crop reliably in a warm UK summer under cover or in a sheltered bed.

Orleans

A popular orange-fleshed variety that suits UK growers looking for a dependable, early-ish crop.

Evangeline

A sweeter orange-fleshed variety that can do well in a long, warm season.

Bonita

A pale-fleshed variety often grown in the UK for a slightly lighter flavour and decent yields.

Sweet Potato guides by town

See how Sweet Potato timing shifts in other towns with different frost dates.