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Molinia caerulea Windsaule - Purple Moor-grass

Molinia caerulea subsp. arundinacea Windsaule
Purple Moor-grass, Moor Grass

4,7/5
14 reviews
1 reviews
0 reviews
0 reviews
1 reviews

Very good establishment. Rapid growth. Very beautiful.

Mzorn, 10/07/2025

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This plant carries a 12 months recovery warranty

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Value-for-money
Molinia caerulea 'Windsaule' is a perennial ornamental grass whose silver spikelets turn yellowish-orange in autumn.
Height at maturity
2.40 m
Spread at maturity
1 m
Exposure
Sun, Partial shade
Hardiness
Hardy down to -29°C
Drought resistance
Average
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Best planting time March, October
Recommended planting time February to April, September to November
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Flowering time August to October
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Description

Molinia caerula subsp. arundinacea 'Windsaule' is a perennial ornamental grass with evergreen foliage whose silver spikes turn yellow-orange in autumn. It is a beautiful airy giant whose beauty develops throughout the seasons.

The Molinia genus belongs to the poaceae family, or grasses. The natural species M. cerulea ssp. arundinacea, from which this variety originates, thrives in heathlands and moist meadows in Northern Europe and Siberia. 'Windsaule' is particularly interesting with a spherical silhouette of 1m (3ft) in diameter at the beginning of the season. The dark green foliage, with trailing strips 40 to 60 cm (16 to 24in) long, gives it lightness. From June onwards, silver spikes rise above the tuft of leaves on top of stems that are 3 metres (10 feet) or more tall giving it a bristly appearance. This Molinia develops its personality as the seasons progress. It reveals its ornamental dimension when the delicate and airy tuft takes on yellow-orange hues in autumn.

It is a hardy and easy plant that requires little maintenance in deep and moist soil, even limestone. It will bring some animation and colour during the cold seasons, alone or in a mass planting with other smaller grasses. Its architectural look helps delineate different areas and brings texture and movement. In a small garden, it can even serve as a hedge. It will also control soil erosion, thanks to its root system.

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Molinie, Molinia caerulea: planting, division, pruning and care
Family sheet
by Alexandra Lambert, experte plantes et jardin 12 min.
Molinie, Molinia caerulea: planting, division, pruning and care
Read article

Molinia caerulea Windsaule - Purple Moor-grass in pictures

Molinia caerulea Windsaule - Purple Moor-grass (Foliage) Foliage

Flowering

Flower colour grey
Flowering time August to October
Inflorescence Spike

Foliage

Foliage persistence Deciduous
Foliage colour dark green
Foliage description Mainly basal leaves, with a sheath surrounding the culm and a linear, elongated, flat lamina gradually attenuate into a point. The green laminae, marked by parallel veins, arch at maturity. The ligule is reduced to a short fringe of hairs.

Plant habit

Height at maturity 2.40 m
Spread at maturity 1 m
Growth rate normal

Botanical data

Genus

Molinia

Species

caerulea subsp. arundinacea

Cultivar

Windsaule

Family

Poaceae

Other common names

Purple Moor-grass, Moor Grass

Botanical synonyms

Molinia arundinacea ‘Windsäule’

Origin

Cultivar or hybrid

Product reference • 802751

Planting and care

Do not plant Molinia caerulea 'Windsaule' in a dry location, it tolerates limestone very well in sun or semi-shade. Be careful to keep the collar (the place where leaves and roots meet) above the ground when planting. Clean the clump and divide in spring.

Planting period

Best planting time March, October
Recommended planting time February to April, September to November

Intended location

Suitable for Meadow
Type of use Border, Free-standing
Hardiness Hardy down to -29°C (USDA zone 5) Show map
Ease of cultivation Amateur
Planting density 1 per m2
Exposure Sun, Partial shade
Soil pH Any
Soil type Clayey (heavy), Clayey-chalky (heavy and alkaline), Silty-loamy (rich and light)
Soil moisture Moist soil, Damp soil, not too dry
Drought resistance Average

Care

Pruning instructions Remove the dry flowers and leaves, using secateurs or shears, at the end of winter.
Pruning Pruning recommended once a year
Pruning time February to March
Disease resistance Good
Overwinter Can be left in the ground
4,7/5

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