How to grow Chilli in the UK
Capsicum annuum
Chilli (Capsicum annuum) is a vegetable that grows well in UK gardens. Easier than sweet peppers. Apache and Hungarian Hot Wax are bombproof beginners' choices. This guide covers when and how to sow Chilli, the soil and position it likes, watering and feeding, companion planting, and when to harvest.
When to sow & grow Chilli
Sowing and harvest window through the year (UK):
Jan Sow | Feb | Mar | Apr | May Plant | Jun | Jul Harvest | Aug Harvest | Sep Harvest | Oct Harvest | Nov | Dec |
Soil, position & care
- Soil
- Rich soil or pots
- Soil pH
- 6.0–6.8
- Position
- Warm, sheltered, full sun or greenhouse
- Sowing depth
- 0.5 cm
- Spacing
- 45 cm apart
- Sowing
- Sow indoors Jan–Mar at 21°C+ — hot types need the longest season
- Growing
- Feed high-potash once fruiting; keep on the dry side for heat
- Harvest & upkeep
- Heat builds as fruit ripens red
- Watch for
- Aphids, red spider mite, whitefly
Companion planting for Chilli
Grows well with:
Add Chilli to your free 12-month plan and get watering & sowing reminders — no sign-up needed.
Chilli FAQs
When should I sow Chilli in the UK?
In the UK, sow Chilli in January. Sowing across these months gives the plant the right soil temperature and day length to establish well.
What grows well with Chilli?
Chilli grows well alongside Basil, Borage, French Marigold, Pot Marigold, Nasturtium. Good companions can deter pests, attract pollinators or make better use of space.
How much sun does Chilli need?
Chilli prefers full sun (6+ hrs direct).
When is Chilli ready to harvest?
Chilli is typically ready to harvest in July, August, September, October in the UK.
Is Chilli easy to grow?
Moderate. Easier than sweet peppers. Apache and Hungarian Hot Wax are bombproof beginners' choices.