How to Grow Coccineum
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Coccineum
Astilbe × arendsii 'Coccineum'
flowerCoccineum is a hybrid astilbe cultivar prized for its striking deep red feathery plumes and finely divided, ferny foliage. This shade-loving perennial produces dense, arching flower spikes that create a dramatic focal point in woodland and shaded garden settings. It thrives in consistently moist soil and typically reaches 24-36 inches in height.
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Example Coccineum timeline · Pittsburgh, PA (Zone 6b)
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Plant Coccineum
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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First Coccineum blooms
Mid-to-late summerBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Coccineum dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-8, with best performance in cooler climates and consistent moisture
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Dormancy/Emergence
3-4 months (winter dormancy)Plant is dormant underground over winter; new shoots emerge in early spring as soil warms
Apply 2-3 inches of mulch in fall for winter protection in colder zones; do not disturb crowns; ensure good drainage to prevent rot
Vegetative Growth
4-6 weeks (spring to early summer)Finely divided, feathery foliage develops rapidly; stems elongate and leaves unfurl in shade-adapted green tones
Maintain consistent moisture; apply organic mulch to regulate soil temperature and retain moisture; deadhead any winter-damaged growth
Budding & Flowering
2-4 weeks (mid to late summer)Dense, deeply red feathery flower plumes form at stem tips, creating dramatic upright or arching spike structures
Maintain steady moisture; stake tall stems if needed for wind protection; avoid overhead watering to prevent powdery mildew; fertilize lightly if desired
Peak Bloom & Decline
4-6 weeksFlowers reach full color intensity and create maximum garden impact; bloom gradually fades to brownish-red tones over time
Deadhead spent flowers for neatness, or leave seed heads for winter interest; continue regular watering and mulching
Post-Bloom & Dormancy Prep
6-8 weeks (late summer to fall)Foliage begins to decline in fall; aboveground parts gradually deteriorate; plant redirects energy to underground rhizome
Cut back dead foliage in late fall or early spring; apply mulch layer before winter; discontinue fertilization
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Improve air circulation; avoid overhead watering; apply sulfur or neem oil if severe; ensure adequate spacing
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Hand-pick in early morning; use pheromone traps away from plants; apply insecticidal soap if infestations are heavy
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Reduce mulch thickness near crown; use beer traps or copper barriers; hand-pick at dusk; encourage natural predators
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Increase humidity by misting; spray with water to dislodge; apply neem oil if populations are high
Uses
Not for consumption
CulinaryAstilbe is not edible and should never be consumed; it is purely ornamental. [source]
Cut and dried flower arrangements
CraftThe feathery red plumes are excellent for fresh flower arrangements and dry exceptionally well for long-lasting dried displays, adding texture and color to indoor décor. [source]
Shade garden focal point
HouseholdCoccineum serves as a striking ornamental centerpiece in shaded borders, woodland gardens, and shaded perennial beds, providing texture, height variation, and bold red color. [source]
Pollinator and beneficial insect habitat
WildlifeThe dense flower spikes attract bees, butterflies, and other beneficial insects, supporting pollinators and wildlife in shade gardens while providing food sources. [source]
Traditional herbal use
MedicinalSome astilbe species have been used in traditional medicine in Asia, though Coccineum is primarily grown as an ornamental with no established modern medicinal applications. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Coccineum is an ornamental perennial not typically harvested for consumption. Cut flowers for arrangements while in peak bloom by cutting stems at the base with sharp shears; they dry well for dried arrangements. Leave some stems on the plant for garden impact and winter interest.
Fun Facts
- 🌱 Astilbe is native to Asia and North America and has been cultivated for centuries; the name 'Astilbe' comes from Greek words meaning 'without shine,' referring to the lack of gloss on the foliage.
- 🌱 Coccineum astilbes were developed through deliberate hybrid breeding programs in Germany in the early 20th century, specifically to create vibrant red flower forms.
- 🌱 The feathery plumes can reach up to 36 inches tall and create dramatic silhouettes, especially when backlit by dappled sunlight in shade gardens.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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