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Value-for-money

Lithodora diffusa Heavenly Blue

Lithodora diffusa Heavenly Blue
Purple Gromwell

4,6/5
10 reviews
5 reviews
0 reviews
1 reviews
0 reviews

small, scrawny young plants, not very vigorous, worried about their survival.

Moumoune, 28/03/2025

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This plant carries a 12 months recovery warranty

More information

Graden Merit Value-for-money
During May and June, this small groundcover plant with loose habit blooms with magnificent gentian blue flowers.
Flower size
2 cm
Height at maturity
15 cm
Spread at maturity
40 cm
Exposure
Sun, Partial shade
Hardiness
Hardy down to -20°C
Soil moisture
Dry soil, Moist soil
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Recommended planting time February to April, September to November
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Flowering time May to June
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Description

The Lithodora diffusa Heavenly Blue is a small ground cover with a loose habit, covered with beautiful gentian blue flowers from May to June.

This lovely variety has star-shaped trumpet flowers, with a particularly intense gentian blue color that blooms for several weeks. Its semi-evergreen, villous foliage is a beautiful dark green. Lithodora Heavenly Blue is the perfect companion for heathers as it has similar requirements, but it also thrives in poor and well-drained soils in partially shaded areas or in the sun, alongside field of plants such as linaria, botanical tulips or creeping wormwood.

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Lithodora diffusa Heavenly Blue in pictures

Lithodora diffusa Heavenly Blue (Flowering) Flowering
Lithodora diffusa Heavenly Blue (Plant habit) Plant habit

Flowering

Flower colour blue
Flowering time May to June
Flower size 2 cm

Foliage

Foliage persistence Evergreen
Foliage colour green

Plant habit

Height at maturity 15 cm
Spread at maturity 40 cm
Growth rate normal

Botanical data

Genus

Lithodora

Species

diffusa

Cultivar

Heavenly Blue

Family

Boraginaceae

Other common names

Purple Gromwell

Origin

Cultivar or hybrid

Product reference846420

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Planting and care

Heavenly Blue Lithodora diffusa thrives in well-drained soil, including poor sandy and clay soils, but dislikes limestone. It's also highly resistant to winter cold.

Planting period

Recommended planting time February to April, September to November

Intended location

Suitable for Rockery, Shaded rockery
Type of use Edge of border, Container, Slope
Hardiness Hardy down to -20°C (USDA zone 6b) Show map
Ease of cultivation Amateur
Planting density 5 per m2
Exposure Sun, Partial shade
Soil pH Acidic, Neutral
Soil type Silty-loamy (rich and light), Stony (poor and well-drained)
Soil moisture Dry soil, Moist soil, draining

Care

Pruning No pruning necessary
Overwinter Can be left in the ground
4,6/5

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