How to Grow Astilbe Granat
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Astilbe Granat
Astilbe × arendsii 'Granat'
flowerAstilbe Granat is a hybrid perennial prized for its dramatic deep red to burgundy feathery plumes that rise above finely divided, fern-like foliage. This shade-loving plant blooms in mid to late summer and adds vertical interest and rich color to woodland gardens and shaded borders. The delicate flowers fade to russet tones as they age, extending the ornamental value of the plant.
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Example Astilbe Granat timeline · Pittsburgh, PA (Zone 6b)
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Plant Astilbe Granat
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 Astilbe Granat blooms
Mid-to-late summerBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Astilbe Granat 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 (zones 3-7)
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Get my Astilbe Granat timeline →Growth Stages
Dormancy/Emergence
Winter through early springPlant is dormant underground in winter; new shoots emerge in spring as temperatures warm
No special care needed; ensure crown is not buried deeply. Do not disturb roots.
Vegetative/Foliage Development
Spring through mid-summer (8-12 weeks)Ferny, delicate foliage emerges and develops throughout spring and early summer, gradually reaching full size with no flowers visible yet
Keep soil consistently moist. Apply 2-3 inches of mulch. Monitor for pests. Fertilize monthly with balanced fertilizer or fish emulsion.
Bud Formation
Mid to late summer (2-3 weeks)Flower buds begin forming at the tips of tall stems; feathery plume structures become visible but remain tightly closed
Maintain consistent moisture—this is critical for quality blooms. Do not allow soil to dry. Continue gentle fertilizing.
Flowering
Late summer through early fall (4-6 weeks)Deep red to burgundy feathery plumes fully open and expand, creating a striking vertical accent; flowers age to russet and bronze tones
Continue watering to extend bloom time. Deadhead spent flowers if desired, though fading flowers are ornamental. Stake if needed in windy locations.
Post-Bloom/Dormancy
Fall through winterFlowers fade and seed heads persist; foliage begins to decline as temperatures cool; plant enters dormancy
Leave seed heads and faded foliage in place for winter interest and wildlife. Cut back in spring before new growth emerges. Divide crowded plants in fall or spring.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Hand-pick beetles early morning, use insecticidal soap, or apply neem oil; encourage natural predators like parasitic wasps
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Remove debris and leaf litter where they hide; use beer traps, copper tape barriers, or diatomaceous earth; handpick at night
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Increase humidity by misting foliage; spray with water to dislodge; use insecticidal soap or neem oil if severe
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Ensure good air circulation; avoid overhead watering; apply sulfur dust or fungicide; remove affected foliage
Uses
Fresh and Dried Flower Arrangements
HouseholdThe deep red plumes are excellent for fresh flower arrangements and are particularly valued for dried arrangements, lasting months when properly dried. The feathery texture adds movement and elegance to bouquets. [source]
Pollinator and Beneficial Insect Support
WildlifeThe delicate flowers attract butterflies, bees, and other beneficial insects, providing nectar and pollen sources in shaded areas where pollinators are limited. The plant also offers shelter for ground-dwelling insects. [source]
Garden Design and Ornamental Display
CraftThe architectural feathery plumes provide vertical interest and rich color contrast in shade gardens; excellent for creating depth, softening hard edges, and adding movement to landscape designs. [source]
Traditional Asian Medicine
MedicinalSome Astilbe species have been used in traditional Chinese and Japanese medicine for various purposes, though Astilbe Granat specifically is primarily ornamental rather than medicinal. [source]
Edible Foliage in Asian Cuisine
CulinaryWhile not commonly used, some Astilbe species (particularly A. japonica) have tender young shoots and fern-like leaves that are occasionally foraged or cultivated as edible vegetables in Asian cuisines, though Granat is primarily grown as ornamental. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Astilbe Granat is an ornamental perennial and is not typically harvested for food. Cut flowers can be harvested for fresh arrangements by cutting stems at base in early morning when plumes first open; they will continue opening indoors. Flowers also dry beautifully for dried arrangements—hang bundles upside down in a cool, dry location for 2-3 weeks.
Fun Facts
- 🌱 The name 'Granat' comes from the German word for pomegranate, referring to the deep ruby-red color of the plumes that resembles pomegranate seeds.
- 🌱 Astilbe Granat is sterile and does not produce viable seeds, making it a non-invasive ornamental that won't self-seed in gardens.
- 🌱 The feathery plumes are actually the flowers densely packed on a panicle inflorescence, and they age beautifully to russet and bronze tones, providing two-stage ornamental interest in the same bloom.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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