Encyclopedia - Plants for ponds
Related knotweed
Polygonum affine
Perennial, herbaceous plant 20-25 cm high. Stems ascending. Leaves ovate-lanceolate or oblong-lanceolate, entire, evergreen. Flowers small, pale pink, becoming pinkish-red by the end of flowering, gathered in dense spike-like inflorescences 6-10 cm long. Flowers from May for 80-90 days. Produces fruit. Decorative even after flowering, when the fruits and leaves acquire a dark red coloration. In cultivation since 1845. There are two cultivars: Darieeling Red - flowers densely pink; Donald Lowndes - flowers pink-red.
Prefers a shady location, but also grows well in sun. Not demanding to soils, but dislikes acidity. Successfully develops only on well-drained sites. Drought-tolerant. Does not tolerate stagnant groundwater. Recommended for group and border plantings. Hardy, but suffers in snowless winters. A preventive covering with conifer branches is desirable. To preserve overwintered leaves, spring shading is necessary. Extremely decorative when used to create groundcover groups and for planting on wide terraces of rock gardens. Suitable for cutting and dried bouquets.
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