Pennisetum x advena 'Rubrum'
Overview
Uses: Seasonal borders, container plantings, patio accents, mass plantings, focal points
Benefits: Rich burgundy foliage, soft bottlebrush plumes, strong vertical texture, reliable summer performance
USDA Hardiness Zones: 9–11 (grown as an annual in colder climates)
Sun: Full Sun to Partial Sun
Life Cycle: Tender Perennial
Growth Habit: Clumping, Upright — arching blades with fountain-like form.
Bloom Color: Burgundy
Foliage Color: Deep Purple to Burgundy
Mature Height: 4–5'
Mature Width: 3–4'
Bloom Season: Summer through Frost
Growth Rate: Fast
Summary
'Rubrum' Purple Fountain Grass delivers bold color and movement, forming a dramatic fountain of arching burgundy foliage topped with soft, smoky plumes.
This ornamental grass creates strong vertical texture in beds and containers, with narrow leaves that emerge deep purple and maintain rich coloration through the heat of summer. Airy bottlebrush flower spikes rise above the foliage, catching light and movement from midsummer until frost.
In warm climates it behaves as a tender perennial, while in cooler regions it is commonly grown as a seasonal annual accent. Its bold color makes it especially effective when paired with lighter foliage or flowering plants.
Care
Purple Fountain Grass Care
Plant in full sun for the deepest foliage color and strongest growth. Partial sun is tolerated but may reduce overall intensity of color.
Grow in well-drained soil. Water regularly during establishment, then allow soil to dry slightly between waterings. Established plants tolerate short dry periods.
Feed lightly in spring or early summer with slow release fertilizer if desired.
In colder zones, plants are typically grown as annuals. In warm climates where perennial, cut back foliage in late winter before new growth begins.
Plants hardy in the ground may require winter protection when grown in containers in colder zones.
Size
What Size is Purple Fountain Grass for Sale Online?
Plants ship in a greenhouse-grade grow pot and are sized appropriately for safe transit and successful establishment. Each plant is actively growing at time of shipment. For current pot dimensions, please contact us.
How Large Does Purple Fountain Grass Grow?
At maturity, plants typically reach 4–5 feet tall (including plumes) and 3–4 feet wide. When grown as a seasonal annual in cooler climates, plants may remain slightly smaller.
Additional Information
What are some common names for this plant?
Pennisetum x advena 'Rubrum' is commonly known as Purple Fountain Grass or Red Fountain Grass.
Is Purple Fountain Grass deer resistant?
Ornamental grasses are generally avoided by deer. This variety works well in Deer-Resistant Perennials and Grasses plantings where browsing pressure is present.
Can this grass be grown in containers?
Yes. Its upright, fountain-like form makes it especially effective in large patio containers and mixed planters alongside other Annuals or bold Ornamental Grasses.
