Purple Fountain Grass (Pennisetum setaceum 'Rubrum')

Purple Fountain Grass

Pennisetum setaceum 'Rubrum'

Deep purple foliage sways like a wine-red fountain, softening garden edges. Ornamental grass; common name: Purple Fountain Grass.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun to partial shade; full sun intensifies the deep purple foliage color
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Watering Water deeply when the top 5–7 cm of soil is dry; tolerates short periods of drought once established
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Temperature Hardy to mild frosts; protect from temperatures below -1°C; thrives in warm, sunny growing conditions
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Characteristics

  • Leaf: Narrow, arching blades with deep burgundy-purple color, 30–90 cm long
  • Flower: Feathery, cylindrical pinkish-purple plumes that fade to tan as they mature
  • Stem: Erect, slender stems matching foliage color, supporting flower plumes
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Care Guide

Watering

Keep soil evenly moist during active growth; avoid overwatering to prevent root rot

Fertilization

Apply diluted balanced liquid feed once monthly. Avoid over-fertilization, as excess nutrients can cause foliage to fade to green

Banana peel compost tea:Soak fully composted banana peels in water for 24 hours; dilute 1:20 for root drench; discard solids to avoid pest infestations and odor
Pruning
  • Cut back dead foliage to 5–10 cm above soil level in late winter to early spring to encourage new growth
  • Remove spent flower plumes to maintain a tidy appearance and promote potential rebloom
  • Thin overcrowded clumps every 2–3 years in early spring to improve airflow and vigor
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic to cats; no adverse effects reported

Humans: No toxic effects reported with ingestion or skin contact

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Garden Uses & Culture

Culture: Symbolizes graceful movement and soft texture in landscape design

Usage: Ornamental garden grass, container planting, dried flower arrangements