Lobelia 'Sapphire'

Trailing lobelia

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Key information

Plant type

Tender perennial

Flower colour





Half hardy

Skill level


Lobelia 'Sapphire'

Plant details

Trailing lobelia is the perfect plant for growing in hanging baskets, window boxes and summer container displays. With a neat, trailing habit, flowers spill over the sides of containers, bearing masses of deep blue flowers over a long period.

Lobelia 'Sapphire' has intense purple-blue flowers, contrasting with bright green foliage. It looks spectacular when planted amongst other blue-flowered plants, as well as flowers in a range of primary colours. For best results grow in sun to partial shade in rich, moisture-retentive soil. Keep plants well watered and feed fornightly with a potash-rich fertiliser.

Family: Campanulaceae

Genus: Lobelia

Cultivar: Sapphire

Plant type: Tender perennial

Flower colour: Blue

Foliage colour: Mid-green

Feature: Flowers

Sun exposure: Full sun, Partial shade

Soil: Well-drained/light, Clay/heavy, Acidic, Chalky/alkaline, Moist

Hardiness: Half hardy

Skill level: Beginner

Height: 10cm

Spread: 25cm

Time to plant seeds: March to April

Time to plant: May to June

Flowering period: May to November

Reader reviews


I thought I'd try and save money on bedding plants this year by growing more from seed but it's three weeks since I sowed my trailing lobelia seeds and there hasn't been the slightest sign of germination. Am I being to impatient? I have them on a dining room windowsill which has good light and daytime temperatures of around 21 degrees. Any comments or hints would be really helpful as I have some of the seeds left in the packet and could do something different next time!

sheila blethyn

I have always found lobelia difficult to germinateBuy a tray fro 2.50 It will regrow each year in a pot Sheila

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