How to grow Sweet Alyssum in the UK
Lobularia maritima
Sweet Alyssum (Lobularia maritima) is a flower that grows well in UK gardens. Honey-scented carpet. Self-seeds — sow once, it returns for years. Perfect for edging. This guide covers when and how to sow Sweet Alyssum, the soil and position it likes, watering and feeding, companion planting, and when to harvest.
When to sow & grow Sweet Alyssum
Sowing and harvest window through the year (UK):
Jan | Feb | Mar | Apr Sow | May Sow | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
Soil, position & care
- Soil
- Any reasonable, moisture-retentive but free-draining soil
- Soil pH
- 6.0–7.5
- Position
- Full sun for most; some tolerate light shade
- Sowing depth
- Surface to 1 cm (check light requirement)
- Spacing
- 15–30 cm apart
- Sowing
- Sow under cover late winter–spring, or direct after the last frost
- Growing
- Water regularly; pinch tips for bushier plants
- Harvest & upkeep
- Deadhead often to prolong flowering
- Watch for
- Slugs and snails on seedlings; aphids on soft growth
Companion planting for Sweet Alyssum
No specific companion notes for this plant.
Add Sweet Alyssum to your free 12-month plan and get watering & sowing reminders — no sign-up needed.
Sweet Alyssum FAQs
When should I sow Sweet Alyssum in the UK?
In the UK, sow Sweet Alyssum in April, May. Sowing across these months gives the plant the right soil temperature and day length to establish well.
How much sun does Sweet Alyssum need?
Sweet Alyssum prefers full sun (6+ hrs direct).
Is Sweet Alyssum easy to grow?
Easy — good for beginners. Honey-scented carpet. Self-seeds — sow once, it returns for years. Perfect for edging.