About
Astilbe 'Martha Illing' (x _arendsii_) is a unique perennial that grows in clumps, reaching heights of up to 90 cm. It features finely divided green leaves, which provide a lush backdrop for its tall flower spikes. In July, these spikes produce reddish-pink blooms that add color to shaded garden areas.
About the genus
Astilbe are perennial plants with rhizomes, characterized by their dissected leaves that typically have a ternate structure. In summer, they produce upright panicles filled with small flowers in shades of white, pink, or purple. The dried flower heads persist into autumn, adding interest to the landscape.
Growing conditions
- Sunlight
- Partial shade
- Soil type
- Clay, Loam
- Soil pH
- Acid, Alkaline, Neutral
- Soil moisture
- Moist but well-drained, Poorly-drained
- Aspect
- East-facing, North-facing, West-facing
- Exposure
- Sheltered
- UK hardiness
- H7
Plant details
- Plant type
- Bogs, Herbaceous Perennial
- Habit
- Clump forming
- Foliage
- Deciduous
- Height
- 0.5-1 metres
- Spread
- 0.5-1 metres
- Time to full height
- 2-5 years
- Suggested uses
- Cottage and informal garden
Care notes
- Cultivation
- Grow in moist or boggy soil in dappled shade, where the soil never dries out and remains moisture-retentive in summer. Drought intolerant, and may be scorched in direct sun. Good for waterside and woodland planting. See Astilbe cultivation
- Pruning
- Flowering stems can be tidied and cut back when flowers fade, but can also be left for winter interest and wildlife habitat
- Propagation
- Propagate by division in late winter to early spring; replant immediately or pot up and grow on under glass to plant out in late spring when plants are re-established
- Pest resistance
- May be susceptible to vine weevil
- Disease resistance
- May be susceptible to leaf spot weather damage and powdery mildews