How to grow Basil in the UK
Ocimum basilicum
Basil (Ocimum basilicum) is a herb that grows well in UK gardens. Loves warmth, hates wet feet. UK climate is borderline — keep indoors or in greenhouse. This guide covers when and how to sow Basil, the soil and position it likes, watering and feeding, companion planting, and when to harvest.
When to sow & grow Basil
Sowing and harvest window through the year (UK):
Jan | Feb | Mar | Apr Sow | May | Jun Plant · Harvest | Jul Harvest | Aug Harvest | Sep Harvest | Oct | Nov | Dec |
Soil, position & care
- Soil
- Light, free-draining soil; many herbs resent winter wet
- Soil pH
- 6.0–7.5
- Position
- Warm, sunny windowsill or greenhouse — hates cold
- Sowing depth
- Surface to 1 cm
- Spacing
- 20–30 cm apart
- Sowing
- Sow indoors Apr–Jun at 18°C+; do not plant out until warm
- Growing
- Water in the morning, keep leaves dry; pinch flowers off
- Harvest & upkeep
- Pinch tips regularly to keep bushy
- Watch for
- Slugs, grey mould, damping off
Companion planting for Basil
Grows well with:
Add Basil to your free 12-month plan and get watering & sowing reminders — no sign-up needed.
Basil FAQs
When should I sow Basil in the UK?
In the UK, sow Basil in April. Sowing across these months gives the plant the right soil temperature and day length to establish well.
What grows well with Basil?
Basil grows well alongside Asparagus, Aubergine, Chilli, Grape Vine, Sweet Pepper, Beef Tomato. Good companions can deter pests, attract pollinators or make better use of space.
How much sun does Basil need?
Basil prefers full sun (6+ hrs direct).
When is Basil ready to harvest?
Basil is typically ready to harvest in June, July, August, September in the UK.
Is Basil easy to grow?
Moderate. Loves warmth, hates wet feet. UK climate is borderline — keep indoors or in greenhouse.