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How to grow Annual Salvia in the UK

Salvia splendens

Annual Salvia growing in a UK garden

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.

Type
Flowers
Difficulty
Moderate
Position
full sun (6+ hrs direct)
Sow
March
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.

Grow Annual Salvia this year

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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.

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