When to plant Red bistort 'Rosea'?

Persicaria amplexicaulis 'Rosea' thrives in full sun or partial shade, making it a versatile choice for borders and damp spots in the garden. It performs best in moisture-retentive soils, particularly loam or clay, which hold water well—essential for this thirsty perennial. Avoid dry, sandy soils unless you can commit to frequent watering. Plant in March, April or May for spring planting, or in September and October for autumn planting. Both windows work well, though autumn planting allows roots to establish over winter. Before planting, dig over the soil and incorporate plenty of organic matter—well-rotted compost or manure—to improve moisture retention and fertility, especially if your soil is on the lighter side. Space plants 60 cm apart to allow for their mature spread of 60–90 cm. Dig a planting hole slightly larger than the root ball, set the plant at the same depth it was growing in its pot, and firm the soil gently around the roots. Water thoroughly immediately after planting to settle the soil and eliminate air pockets. Apply a 5 cm layer of organic mulch around the base of each plant, keeping it clear of the stems. This helps retain moisture—critical for persicaria—and suppresses weeds while the plant establishes. In the first few weeks, check soil moisture regularly and water whenever the top few centimetres feel dry. Once established, 'Rosea' will tolerate brief dry spells but always performs best with consistent moisture, particularly during its long flowering season from early summer through to autumn.