Astilbe x arendii 'GLORIA PURPUREA' false spiraea

Gloria Purpurea is a historic cultivar of false spiraea bred by Georg Adalbert Arends around 1920, at the peak of his hybridizing work. Its pedigree includes all the species he used in his breeding: A. chinensis (for dense inflorescences and drought tolerance), A. japonica (for early flowering and a compact habit), A. thunbergii (for height and airy grace), and A. davidii (for robust growth and long flower spikes). Together, these qualities gave rise to a plant of striking elegance — a cultivar whose reputation still endures, as it remains one of the most sought-after selections today.

Gloria Purpurea is a relatively tall variety, with vivid pink to purplish flower panicles that stand erect and full. It begins blooming in early July and, under ideal conditions, can flower continuously into late August. Its leaves are deciduous, glossy, deep green, and finely divided, with a bronzy tint that becomes more prominent in autumn. The plant grows to a height of 60–70 cm and is generally untroubled by pests or diseases. Try pairing it in a moist border with bold-leaved hostas, bold-coloured Heuchera cultivars, and dark-leaved Ligularia — their broad foliage offers a powerful contrast to the finely textured leaves of the astilbe. And for a longer season of interest, add early-blooming perennials such as Brunnera and Pulmonaria, which shine in springtime and then quietly recede, allowing the astilbes to take centre stage in high summer — while their lower stature and distinctly textured foliage still provide valuable contrast.

If the plant blooms profusely in its first flush and is growing in nutrient-mediocre or even poor soil, the foliage may appear exhausted after flowering. In that case, it's worth cutting the plant back to the ground, feeding with a liquid fertilizer, which will encourage it to regrow; the fresh foliage will remain decorative until the end of the season. Regular feeding also promotes reblooming throughout the summer holidays.

In their natural habitat, astilbes thrive in mountain ravines and damp forests, where they appreciate shade and moist soil. Thanks to their tolerance for both shade and moisture, they have become popular perennials for planting around ponds and in woodland gardens. They are not difficult to grow as long as they have proper conditions: rich, moisture-retentive soil and a preference for partial shade over full sun. However, given regular watering or a naturally damp site, they will also perform well in full sun. Good fertilization enhances both the size and quality of the blooms. Avoid overly alkaline soils and compacted clays that dry out in summer — they are not suitable. For optimal performance, divide and rejuvenate clumps every four years, removing old and dying rhizomes. Do this in early spring before new growth starts. Old foliage and flower stalks should also be cut back in early spring. Fully hardy to approximately –34 °C (USDA zone 4). Perfect for large planters, too, where it will require more frequent watering and feeding.

Last update 29-06-2025