Red Astilbe (Astilbe rubra)

Red Astilbe

Astilbe rubra

Feathery red plumes soften shaded borders, a cloud of summer color. Herbaceous perennial; common names: Red Astilbe, False Spirea.

Partial sun
1–2/week
Beginner
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Plant Needs

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Sunlight Partial to full shade; avoid direct midday sun which can scorch delicate foliage
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Watering Keep soil consistently moist but not waterlogged; avoid allowing the root zone to dry out completely
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Temperature Hardy to -30°C; tolerates cool summer temperatures, avoid prolonged heat above 28°C
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Characteristics

  • Leaf: Compound, toothed, dark green fern-like foliage on long, sturdy petioles
  • Flower: Dense, upright feathery panicles of tiny bright red flowers
  • Stem: Smooth, green herbaceous stems; no woody growth
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Care Guide

Watering

Keep soil evenly moist; apply mulch to retain moisture and regulate soil temperature

Fertilization

Apply diluted balanced liquid feed once monthly. Avoid over-fertilizing, which can reduce flower production and weaken foliage

Composted banana peel tea:Compost banana peels for 2–3 weeks, steep in water for 24 hours, dilute 1:20 for root drench to support flower development
Pruning
  • Cut back spent flower plumes after blooming to maintain garden tidiness
  • Trim dead foliage to ground level in late autumn or early spring
  • Divide overcrowded clumps every 3–4 years in early spring to promote vigorous growth
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA confirmed non-toxic to cats; no reported toxicity

Humans: Non-toxic to humans; no known adverse health effects from ingestion or contact

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Garden Uses & Culture

Culture: Symbolizes patience and dedication due to its ability to thrive in low-light, challenging growing conditions

Usage: Shade garden border plant, cut flower for fresh floral arrangements, container ornamental