How to Grow Shade-loving Perennials (Astilbe, Coral Bells, Brunnera)
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Shade-loving Perennials (Astilbe, Coral Bells, Brunnera)
Astilbe spp., Heuchera spp., Brunnera macrophylla
flowerA trio of elegant shade perennials that excel in woodland and partial shade gardens. Astilbe offers feathery plumes in pink, red, or white; Coral Bells provides colorful foliage in burgundy, lime, or bronze; and Brunnera displays delicate forget-me-not-like blue flowers with attractive heart-shaped leaves. Together they create year-round interest with varying heights, textures, and seasonal appeal.
When should you plant Shade-loving Perennials (Astilbe, Coral Bells, Brunnera) in your zone?
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Example Shade-loving Perennials (Astilbe, Coral Bells, Brunnera) timeline · Pittsburgh, PA (Zone 6b)
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Plant Shade-loving Perennials (Astilbe, Coral Bells, Brunnera)
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 Shade-loving Perennials (Astilbe, Coral Bells, Brunnera) blooms
Mid-to-late summerBefore the first fall frost (≈ Nov 8)
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Growing Conditions
Soil
Growing Zones
Find your zone →Zones 3-8 for Astilbe and Brunnera; Zones 3-9 for Coral Bells. All prefer cooler climates with afternoon shade in southern zones.
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Get my Shade-loving Perennials (Astilbe, Coral Bells, Brunnera) timeline →Growth Stages
Vegetative Growth
6-8 weeks (spring)Robust leaf development; plants expanding in size. Coral Bells foliage becomes vibrant; Astilbe and Brunnera produce increasingly lush foliage
Maintain consistent moisture. Apply balanced fertilizer monthly during growing season. Remove any dead or damaged leaves. Support tall Astilbe varieties if needed.
Flowering
6-12 weeks depending on variety and zoneAstilbe produces feathery plumes (late spring-summer); Brunnera sends up delicate blue flowers on wiry stems (spring); Coral Bells blooms with tiny bell-shaped flowers on upright spikes (spring-early summer)
Deadhead spent flowers to encourage repeat blooming (especially Brunnera). Do not remove Astilbe plumes if desired dried arrangements. Continue regular watering.
Summer Maintenance
8-12 weeks (June-August)Flowering subsides; foliage remains attractive. Plants settle into steady growth; Coral Bells foliage deepens in color
Increase watering during heat; shade cloth may help in hot zones. Deadhead remaining flowers. Fertilize monthly if desired. Mulch to keep roots cool and moist.
Dormancy
November-MarchPlants slow growth as temperatures drop. Astilbe foliage becomes reddish-brown (ornamental value); Coral Bells may change color; Brunnera dies back partially
Reduce watering. Leave seed heads and foliage for winter interest and wildlife shelter (cut back in early spring before new growth). Apply 2-3 inch mulch layer for winter protection in zones below zone 5.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Hand-pick at dusk, use copper tape or beer traps, encourage ground beetles and toads, apply neem oil or diatomaceous earth, reduce excess moisture
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Remove affected foliage, spray with insecticidal soap or spinosad, encourage natural predators
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Increase humidity by misting, improve air circulation, spray with neem oil or horticultural oil, remove heavily infested leaves
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Improve air circulation, remove affected leaves, spray with sulfur or potassium bicarbonate fungicide, avoid overhead watering
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Remove infected leaves promptly, improve drainage and air flow, avoid overhead watering, apply sulfur or copper fungicide if severe
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Hand-pick adults at night, remove debris harboring larvae, apply neem oil at dusk, usually minor cosmetic damage
Uses
Edible Flowers
CulinaryBrunnera and Coral Bells flowers are edible with mild, slightly sweet flavors and can garnish salads, desserts, and cocktails for visual appeal, though Astilbe is not typically consumed. [source]
Dried Arrangements & Floristry
CraftAstilbe plumes are prized for dried flower arrangements, wedding bouquets, and craft projects, retaining their structure and delicate texture for months. Brunnera and Coral Bells foliage add texture to dried designs. [source]
Traditional Herbal Uses
MedicinalBrunnera has been used in traditional European herbalism for respiratory support and minor wounds, though scientific evidence is limited. Consult herbalists before internal use. [source]
Pollinator & Bird Support
WildlifeAll three plants attract pollinators (bees, butterflies) and provide shelter for ground-dwelling wildlife. Astilbe and Brunnera seeds feed birds; the dense foliage offers nesting and overwintering habitat for beneficial insects. [source]
Shade Garden Landscaping
HouseholdThese perennials solve the challenging problem of beautifying shaded areas under trees or north-facing walls. They provide reliable, multi-season color and texture requiring minimal fussing once established, making them workhorses of shade gardens. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Harvest flowers for fresh or dried arrangements at peak bloom. Cut Astilbe plumes when feathery and open; they dry beautifully in vases without water. Brunnera sprigs are charming in small bouquets. Coral Bells flowers are delicate and best admired in the garden. Harvest foliage of all three for shade arrangements. Divide mature clumps (3-4 years) in early spring or fall to rejuvenate.
Fun Facts
- 🌱 Astilbe's feathery plumes are actually clusters of tiny, sterile flowers and don't produce seeds; their dramatic effect is purely ornamental. The name comes from Greek 'a' (without) and 'stilbe' (shine), ironically describing their dull flowers that belie their stunning appearance.
- 🌱 Coral Bells (Heuchera) foliage comes in stunning varieties like 'Obsidian' (nearly black), 'Key Lime Pie' (chartreuse), and 'Marmalade' (copper-orange), often changing color with seasons. Some gardeners grow them exclusively for the foliage, removing flower buds to maximize leaf production.
- 🌱 Brunnera macrophylla is also called 'Siberian Bugloss' and is completely unrelated to true Forget-me-nots despite their similar appearance. The similar flowers evolved independently—a case of convergent evolution. It's extremely cold-hardy and can thrive in harsh climates where many other plants struggle.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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