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Collector's item

Pennisetum incomptum

Pennisetum incomptum

4,5/5
5 reviews
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1 reviews
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Very beautiful young plants, I will order more for my other pots. The shoots are growing very well, I hope they survive the winter.

Christine, 12/07/2022

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This plant carries a 12 months recovery warranty

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Value-for-money
A hardy, perennial grass that grows close to the ground and is great for larger, slightly untamed areas. The grass features beautiful green-grey foliage with narrow, silver spikes that turn beige when the plant reaches 1.2 metres (4 feet). This species is often used to prevent soil erosion on slopes and can thrive in full sunlight, adapting to all types of soils while withstanding sea spray.
Flower size
20 cm
Height at maturity
1.10 m
Spread at maturity
90 cm
Exposure
Sun
Hardiness
Hardy down to -20°C
Soil moisture
Moist soil
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Best planting time March, September
Recommended planting time February to May, August to October
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Flowering time June to October
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Description

The Pennisetum incomptum is a robust perennial grass that is very hardy and tolerant of soil, spray, and drought. Made for large, slightly wild spaces, it is easy to contain in a large pot. This conquering species forms a large tuft with an upright, somewhat blurry habit of green-grey colour, attractive from the beginning of summer due to its early flowering. Its long, swaying spikes dominate the shifting mass of foliage, like fine plumes evolving from silver-green to beige-brown at the end of the season. This species has a trailing root system that needs to be controlled. Very easy to grow and undemanding, it is an ideal plant for large sunny beds, even in poor or occasionally dry soil in summer.

 

The Pennisetum incomptum is a grass native to northern China and belongs to the large Poaceae family. This grass with fluffy panicles develops from a powerful rhizomatous base. At maturity and in full bloom, it will form tufts over a metre high, expanding without theoretical limit over the years. Unlike other Pennisetum, this species has a somewhat upright habit. The basal tuft consists of long, very thin leaves of a slightly glaucous grey-green colour. The flowering culms emerge from the vegetation in June-July, carrying upright flower heads composed of very silky spikelets gathered in thin spikes, 20 to 25 cm (8 to 10in) long. Their colour evolves from silver-green to beige-brown in September-October. The foliage turns straw yellow in autumn. The plant remains decorative for a good part of winter and looks stunning covered in frost.

 

This vigorous grass provides a natural solution for landscaping difficult areas to retain a dry slope, ensure the decor of an urban space or a contemporary-style bed, or keep any unwanted intruders out. It requires space and lots of sun to express all its qualities, and it accepts areas beaten by winds and coastal climates. It could be associated with other large grasses such as Miscanthus or pampas grass and with vigorous shrubs and perennials such as Russian sage, broom, perennial sunflowers, or tall thistles. Grasses bring a suppleness to any landscape without overshadowing the beauty of their companions. Pennisetum allows for movement in beds strategically placed between rocks in a rock garden or on a wall. Don't deprive yourself of your sense of touch either: their panicles are as silky to the touch as they appear.

Pennisetum incomptum in pictures

Pennisetum incomptum (Flowering) Flowering
Pennisetum incomptum (Foliage) Foliage
Pennisetum incomptum (Plant habit) Plant habit

Flowering

Flower colour green
Flowering time June to October
Inflorescence Spike
Flower size 20 cm
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Deciduous
Foliage colour medium green

Plant habit

Height at maturity 1.10 m
Spread at maturity 90 cm
Growth rate fast
Suckering/invasive plant

Botanical data

Genus

Pennisetum

Species

incomptum

Family

Poaceae

Origin

North Asia

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Planting and care

To plant Pennisetum incomptum, choose a sunny spot and dig a hole that is 20 cm (8in) x 20 cm (8in) x 20 cm (8in) in size. This plant can grow in different types of soil such as light and well-drained or dense and slightly moist, and in acidic, neutral, or even alkaline soils. Once established, it can survive summer drought and dryness in poor, sandy, and highly permeable soils. 

If your soil is heavy, mix in coarse sand, gravel, and compost. If it is poor, add leaf compost and well-rotted compost when planting. Remove the young plant from the pot and place it in the hole so that the top of the root ball is covered with 3 cm (1in) of soil. Firmly press the soil and water it thoroughly to remove any air pockets. 

If the weather is dry, water the plant regularly for a few weeks to help it establish. Grasses remain decorative throughout the year but form new foliage in spring. Prune your plants in late January or early February and cut them down to 10 cm (4in) to make room for new foliage.

Planting period

Best planting time March, September
Recommended planting time February to May, August to October

Intended location

Suitable for Meadow, Pond edge
Type of use Border, Container, Slope
Hardiness Hardy down to -20°C (USDA zone 6b) Show map
Ease of cultivation Amateur
Planting density 1 per m2
Exposure Sun
Soil pH Neutral, Calcareous
Soil type Chalky (poor, alkaline and well-drained), Silty-loamy (rich and light), Stony (poor and well-drained)
Soil moisture Moist soil, Ordinary soil, well cultivated.

Care

Pruning instructions Prune the dry stems to 10-15 cm (4-6in) from the soil, using secateurs or shears, at the end of winter.
Pruning Pruning recommended once a year
Pruning time March to April
Disease resistance Very good
Overwinter Can be left in the ground
4,5/5
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