When to plant Yarrow 'Terracotta'?

Achillea 'Terracotta' thrives in full sun and well-drained soil, making it ideal for hot, dry borders and gravel gardens. It tolerates sandy, loamy, and chalky soils but will sulk in heavy clay or anywhere waterlogged. Choose an open position where it receives at least six hours of direct sunlight daily; shade leads to weak, floppy stems and fewer flowers. Plant between March and May or in September and October. Spring planting gives the roots a full growing season to establish, while autumn planting works well if your soil drains freely and doesn't sit wet over winter. Prepare the site by removing weeds and digging in a little grit or sharp sand if your soil is heavy; yarrows hate sitting in moisture. No need to add compost or manure—'Terracotta' actually flowers better in lean, poor soil. Dig a hole slightly wider than the root ball and set the plant so the crown sits level with the surrounding soil surface. Space plants 45 cm apart to allow good air circulation and room for the clumps to spread. Backfill with the excavated soil, firm gently with your hands, and water in thoroughly to settle roots and eliminate air pockets. After planting, water regularly for the first six to eight weeks until you see strong new growth. Once established, yarrow is remarkably drought-tolerant and needs little attention. A 5 cm layer of gravel or grit mulch around the base helps suppress weeds and improves drainage, but keep mulch clear of the crown to prevent rot. Staking is rarely necessary if the plant is grown in full sun and not overfed.