How to grow Annual Salvia in the UK
Salvia splendens
Annual Salvia (Salvia splendens) is a flower that grows well in UK gardens. Loved by hummingbird hawk-moths in late summer. Plug plants easier than seed. This guide covers when and how to sow Annual Salvia, the soil and position it likes, watering and feeding, companion planting, and when to harvest.
When to sow & grow Annual Salvia
Sowing and harvest window through the year (UK):
Jan | Feb | Mar Sow | Apr | May | Jun Plant | 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 Annual Salvia
No specific companion notes for this plant.
Add Annual Salvia to your free 12-month plan and get watering & sowing reminders — no sign-up needed.
Annual Salvia FAQs
When should I sow Annual Salvia in the UK?
In the UK, sow Annual Salvia in March. Sowing across these months gives the plant the right soil temperature and day length to establish well.
How much sun does Annual Salvia need?
Annual Salvia prefers full sun (6+ hrs direct).
Is Annual Salvia easy to grow?
Moderate. Loved by hummingbird hawk-moths in late summer. Plug plants easier than seed.