How to grow Broccoli in the UK
Brassica oleracea
Broccoli (Brassica oleracea) is a vegetable that grows well in UK gardens. Cut the main head before flowers open. Side shoots crop for weeks afterwards. This guide covers when and how to sow Broccoli, the soil and position it likes, watering and feeding, companion planting, and when to harvest.
When to sow & grow Broccoli
Sowing and harvest window through the year (UK):
Jan | Feb | Mar | Apr Sow | May | Jun Plant | Jul Harvest | Aug Harvest | Sep Harvest | Oct Harvest | Nov | Dec |
Soil, position & care
- Soil
- Firm, fertile soil — lime if acid
- Soil pH
- 6.5–7.5
- Position
- Open, sunny site
- Sowing depth
- 1.5 cm
- Spacing
- 60 cm apart
- Sowing
- Sow Apr–Jun (calabrese) for summer/autumn heads
- Growing
- Keep weed-free and evenly watered; mulch to hold moisture
- Harvest & upkeep
- Cut central head, then side-shoots follow
- Watch for
- Cabbage white caterpillars, club root, pigeons, whitefly
Companion planting for Broccoli
Grows well with:
Keep apart from:
Add Broccoli to your free 12-month plan and get watering & sowing reminders — no sign-up needed.
Broccoli FAQs
When should I sow Broccoli in the UK?
In the UK, sow Broccoli in April. Sowing across these months gives the plant the right soil temperature and day length to establish well.
What grows well with Broccoli?
Broccoli grows well alongside Beetroot, Celery, Dill, French Marigold, Lavender, Pot Marigold. Good companions can deter pests, attract pollinators or make better use of space.
What should you not plant near Broccoli?
Keep Broccoli away from Strawberry, Beef Tomato, Cherry Tomato, which can compete with it or share pests and diseases.
How much sun does Broccoli need?
Broccoli prefers full sun (6+ hrs direct).
When is Broccoli ready to harvest?
Broccoli is typically ready to harvest in July, August, September, October in the UK.
Is Broccoli easy to grow?
Moderate. Cut the main head before flowers open. Side shoots crop for weeks afterwards.