When to plant Fernleaf yarrow?

Achillea filipendulina thrives in full sun but tolerates partial shade, though flowering will be less prolific in shadier spots. Choose a well-drained site; this perennial is particularly suited to sandy soil, loam, or chalky soil and dislikes heavy, waterlogged ground. Before planting, dig over the soil to break up any compaction and remove perennial weeds. There's no need to enrich the soil with compost or manure—goudduizendblad actually performs better in lean, free-draining conditions, which encourage sturdy stems and reduce the risk of flopping. Plant in March, April, or May for establishment before summer, or in September and October to give roots time to settle before winter. Dig a hole slightly larger than the root ball, set the plant at the same depth it was growing in its pot, and backfill with soil, firming gently. Space plants 45 cm apart to allow good air circulation and room for the clumps to spread to their mature width of 40–60 cm. Water thoroughly immediately after planting to settle the soil around the roots, but thereafter goudduizendblad needs very little supplementary watering once established—it has low water requirements and tolerates drought well. A light mulch of gravel or grit around the base can help suppress weeds and improve drainage, but avoid organic mulches like bark or compost, which can retain too much moisture around the crown. No staking is usually necessary if the plant is grown in full sun and lean soil, as stems remain sturdy and upright.