Astilbe 'Fanal', often referred to as Arendsii spirea, is a beautiful perennial that brings a vibrant yet elegant atmosphere to shady areas of your garden. With its unique, feathery flower plumes, dressed in a striking ruby red, this plant adds a touch of nature to any flower bed. A fascinating feature of this plant is that it illuminates even deep shade with its intense luminosity – hence the fitting name "Fanal" (beacon). The bright red color of the flowers is complemented by deep green, glossy foliage, creating a beautiful contrast. The stems are robust and usually streaked with dark red, which gives the plant an additional visual dimension.
Typical characteristics:
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unique, feathery flower plumes in intense ruby red
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attractive, deep green foliage with bronze shoots
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bee- and insect-friendly flowers
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provides a colorful, vibrant atmosphere in shady beds
☀️ Location, Soil, etc.
The spirea prefers cool and not too dry conditions. The right location is crucial for the red flowers to maintain their full intensity and not fade.
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Location: partial shade to shade
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no direct, scorching midday sun (leaves can quickly burn or dry out)
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high soil and air humidity preferred
Perfect for shady perennial beds, woodland edges, or the moist banks of garden ponds.
🌿 Care of Astilbe 'Fanal' – Overview
This plant is not only an absolute feast for the eyes but also wonderfully uncomplicated to care for, provided a few basic needs are met. It is suitable for both gardening beginners and experienced plant lovers.
🌱 Growth
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upright, bushy and clump-forming
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reaches a height of approx. 50 to 60 cm
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grows compactly and always maintains a beautiful structure
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contributes to a dense and lively appearance in the garden.
🍃 Leaves
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multiple pinnate, deeply incised and finely serrated
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dark green glossy, often decoratively bronze or reddish-brown when emerging in spring
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form a dense, carpet-like background for the luminous flowers
The interplay of the dark foliage and the fiery flower plumes is a true spectacle in itself.
💧 Watering / Water
Unlike many other garden perennials, Astilbe likes it consistently moist, but it does not tolerate extreme, stagnant waterlogging in compacted soil.
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keep soil consistently moist
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avoid dry root balls (quickly leads to brown foliage and dried-up flowers)
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water regularly and generously on hot summer days
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a layer of mulch helps excellently to retain moisture in the soil.
🌼 Fertilizing
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in spring (March/April): Incorporate a generous amount of mature compost or organic perennial fertilizer into the soil
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during flowering: Optionally support with a lightly dosed, liquid fertilizer
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from late summer stop fertilizing so that the shoots can mature before winter
Over-fertilization or nutrient deficiency can be easily avoided, as compost usually provides the perfect balance.
🌱 Substrate
A nutrient-rich and moisture-retaining soil climate is important:
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humus-rich and deep
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well-draining but moisture-retaining
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slightly acidic to neutral
A mixture of normal garden soil, plenty of compost, and some leaf mold works perfectly.
🪴 Planting / Repotting
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best planting time is early spring or autumn
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when planting in a bed, ensure sufficient planting distance (approx. 40–50 cm)
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can also be kept in large, deep pots on a shady terrace
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divide every 3–4 years in spring to rejuvenate the plant and maintain its flowering vigor.
✂️ Pruning
Astilbe 'Fanal' does not require regular pruning during the growing season.
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simply remove dried leaves at ground level during the year
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spent flower stalks can be cut back in autumn or the following spring
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the dried flower plumes look beautiful with hoarfrost in winter and offer the plant winter protection
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in early spring, cut back the entire perennial at ground level before new growth appears
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use clean and sharp tools.
🌱 Propagating Astilbe 'Fanal'
Propagation is quite easy by dividing the rootstock:
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in early spring (before new growth) or autumn, carefully dig out the root ball with a spade
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divide the rootstock into two or three strong sections with sufficient buds
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immediately plant the sections in the new, shady location and water thoroughly.
☠️ Is Astilbe poisonous?
No – Astilbe 'Fanal' is completely non-toxic.
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safe for cats and dogs
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safe for small animals and horses
Similar to ferns, hostas, and coral bells (Heuchera), it is an absolutely safe option for all pet owners. 👉 You can plant it anywhere in the garden where your furry friends roam without concern.
🧠 Other Care Tips
Astilbes love coolness and high humidity: regularly mulch the soil around the plant with bark mulch or leaves to minimize evaporation. Brown, crispy leaf edges are usually a sign of acute water shortage or too much direct sunlight. The plant is absolutely winter-hardy and does not require additional frost protection in the garden.
✅ Conclusion
With its spectacular ruby-red appearance and completely pet-friendly nature, Astilbe 'Fanal' is an excellent choice for shady spots. It is easy to care for, ideal for beds, pond edges, or shady balconies, and creates a vibrant, colorful atmosphere in partial shade. Let this beautiful spirea enhance your green realm!