Fountain Grass. A clump-forming grass with narrow deep red to burgundy foliage. From mid-summer to autumn, bottlebrush-shaped flowers in silvery red rise above the arching foliage. Height 1.5m. Spread 60cm. Full sun, well-drained soil.
Pennisetum advena ‘Rubrum’ is a striking ornamental grass grown for its deep burgundy foliage and soft bottlebrush flowers. Moreover, it adds height, movement, and colour to borders and containers throughout the growing season.
PLANTING and AFTERCARE GUIDE
Best Planting Time
First, plant Pennisetum advena ‘Rubrum’ in spring or early autumn when the soil is moist and workable. This helps the roots establish before periods of strong growth.
Site Selection
Sunlight: Pennisetum grows best in full sun, where the foliage develops its richest colour and the plant produces more flowers.
Soil: Well-drained soil is essential. Therefore, improve heavy soil by adding compost or grit before planting to improve drainage and soil structure.
Planting Instructions
When planting, follow these steps:
Dig a hole twice the width of the root ball and the same depth.
Mix compost or organic matter into the excavated soil.
Place the plant in the hole with the top of the root ball level with the surrounding soil.
Backfill gently and firm the soil lightly around the plant.
Water thoroughly after planting to help Pennisetum advena ‘Rubrum’ establish.
Watering Requirements
Water regularly while the plant is establishing. However, once established, Pennisetum advena ‘Rubrum’ prefers well-drained soil and does not like sitting in very wet conditions.
Feeding
Apply a balanced fertiliser in spring to encourage strong growth and flowering. Additionally, a yearly mulch will help improve soil fertility and retain moisture.
Pruning
Cut back old foliage in late winter or early spring before new growth appears. This keeps Pennisetum advena ‘Rubrum’ looking tidy and encourages fresh growth.
Mulching
Apply organic mulch around the base in spring to help retain moisture and suppress weeds. As a result, Pennisetum advena ‘Rubrum’ will establish more quickly and grow more vigorously.
Final Tips
Overall, this ornamental grass is ideal for sunny borders, containers, and gravel gardens. With good drainage and minimal maintenance, Pennisetum will provide colour and texture from summer into autumn.
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