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Panicum virgatum Heavy Metal - Switchgrass

Panicum virgatum Heavy Metal
Switchgrass

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More information

Ornamental grass with decorative grey-blue foliage. Its foliage perfectly complements its light, powder blue spikes.
Height at maturity
1.20 m
Spread at maturity
50 cm
Exposure
Sun
Hardiness
Hardy down to -29°C
Soil moisture
Dry soil, Moist soil
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Recommended planting time March to May, September to October
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Flowering time August to October
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Description

The Panicum virgatum Heavy Metal or upright switch grass, is an ornamental grass with decorative gray-blue foliage. Its foliage perfectly complements its light, powdery blue spikes.

Originally from North American prairies, Panicum virgatum is adapted to extreme conditions, it tolerates drought and cold, it is versatile and adapts to many situations in the garden.

Non-spreading, this stiffly upright grass is highly appreciated in small gardens, it adapts to any well-drained soil, it is particularly well suited to coastal areas as it tolerates sea spray.

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Panicum virgatum Heavy Metal - Switchgrass in pictures

Panicum virgatum Heavy Metal - Switchgrass (Flowering) Flowering
Panicum virgatum Heavy Metal - Switchgrass (Foliage) Foliage

Flowering

Flower colour brown/bronze
Flowering time August to October
Inflorescence Spike

Foliage

Foliage persistence Deciduous
Foliage colour grey or silver

Plant habit

Height at maturity 1.20 m
Spread at maturity 50 cm
Growth rate normal

Botanical data

Genus

Panicum

Species

virgatum

Cultivar

Heavy Metal

Family

Poaceae

Other common names

Switchgrass

Origin

Cultivar or hybrid

Product reference811652

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Planting and care

Plant Panicum virgatum 'Heavy Metal' in deep soil, preferably moist and moderately fertile. Fertiliser inputs are unnecessary. Take the trouble to loosen the soil well to promote establishment. Water during dry weather in the first summer. Prefer spring planting in cold regions for better establishment. Wait until the end of winter, February or March, to cut back the dry stems to about 20 cm (8in) from the ground. It is better to leave them during winter, as they provide a decorative presence and offer a refuge to a whole range of useful garden fauna.

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Planting period

Recommended planting time March to May, September to October

Intended location

Suitable for Meadow, Rockery
Type of use Back of border, Container
Hardiness Hardy down to -29°C (USDA zone 5) Show map
Planting density 4 per m2
Exposure Sun
Soil pH Neutral, Calcareous
Soil type Clayey-chalky (heavy and alkaline), Silty-loamy (rich and light), Stony (poor and well-drained)
Soil moisture Dry soil, Moist soil, well-drained

Care

Pruning instructions Prune the dry stems to 15 cm (6in) from the soil, using secateurs or shears, at the end of winter.
Pruning Pruning recommended once a year
Pruning time March to April
Overwinter Can be left in the ground

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