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Pennisetum advena ‘Rubrum’ (Purple Fountain Grass)

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1 Litre(13cm Pot)

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Exceptional plants, better value

Mix & match • Create your own combination

P9 (9cm)

1 Litre

3+ plants

£25.00

£30.00

Save 5%

6+ plants

Most popular!

£45.00

£58.00

Save 10%

9+ plants 

£65.00

£80.00

Save 15%

Plant information

Plant Description

Pennisetum ‘Rubrum’, commonly known as Dwarf Purple Fountain Grass, is a versatile ornamental grass that brings texture, movement, and seasonal colour to gardens and containers. Its glossy green foliage emerges in spring and gradually transforms into warm shades of yellow, amber, and bronze as autumn approaches, creating a dynamic display that evolves with the seasons.

The elegant, arching leaves and distinctive purple-tinted plumes add soft structure and a graceful, flowing effect to borders, mixed planting schemes, or container arrangements. In a sunny spot, the foliage catches light beautifully, complementing both perennial flowers and architectural garden elements.

While not the hardiest grass, Pennisetum ‘Rubrum’ thrives with a little extra care during colder months. Planted in a container, it can be moved to a frost-free location, or protected in the ground with mulch, a cloche, or fleece, ensuring it returns healthy each year. Its compact size makes it suitable for smaller spaces, patios, or terrace planting, while still offering the ornamental appeal of larger fountain grasses.

Whether used to soften a border, frame a patio, or provide seasonal interest, Pennisetum ‘Rubrum’ adds elegance, movement, and autumnal colour, making it a standout choice for gardeners seeking year-round garden beauty.

🌿 How to Care for Pennisetum advena ‘Rubrum’ (Purple Fountain Grass)

How much sun do Pennisetum advena ‘Rubrum’ (Purple Fountain Grass) need?
Pennisetum advena ‘Rubrum’ (Purple Fountain Grass) thrive in full sun (6–8 hours daily). Some varieties can tolerate partial shade, but flowering may be reduced.
Pennisetum advena ‘Rubrum’ (Purple Fountain Grass) prefer well-drained soil, ideally light and moderately fertile. Heavy, waterlogged soil should be avoided to prevent root issues.
The best time to plant Pennisetum advena ‘Rubrum’ (Purple Fountain Grass) is spring or early autumn. Space them according to their mature size, plant at the same depth as their containers, firm in, and water well.
Water Pennisetum advena ‘Rubrum’ (Purple Fountain Grass) regularly during their first growing season. Once established, most grasses are drought-tolerant and only need water during prolonged dry periods.
Pennisetum advena ‘Rubrum’ (Purple Fountain Grass) don’t need much feeding. In poor soils, a light compost mulch or a slow-release fertiliser in early spring is sufficient. Too much feeding can make them floppy.
Pennisetum advena ‘Rubrum’ (Purple Fountain Grass) should be left standing over winter to protect the crown and add structure. In late spring, once new growth appears, cut back dead foliage to just above the fresh shoots.
Divide Pennisetum advena ‘Rubrum’ (Purple Fountain Grass) into clumps every 2–4 years to keep them healthy. The best time is early spring before new growth or late summer for warm-season types.
Pennisetum advena ‘Rubrum’ (Purple Fountain Grass) are usually low-maintenance and pest-resistant. In overly wet or crowded conditions, issues like mildew, rust, or aphids may occasionally appear.

Common reasons include too much shade, overfeeding, or lack of division. Move to a sunnier spot, divide overgrown clumps, and avoid high-nitrogen fertiliser.

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