When to plant Feather Grass?
Best month and method — Stipa tenuissima
Plant your feather Grass in April, May and September — the optimal month is usually May.
You're in the planting season right now — a good moment to start.

Spacing
30 cm
≈ 11 plants
For an X m² border, calculate: X × 11 plants.
Step by step: plant feather Grass
Feather grass thrives in full sun and well-drained soil, making it ideal for gravel gardens, Mediterranean-style borders, and sunny banks. It tolerates sandy, loamy, and chalky soils but will not perform well in heavy clay or waterlogged ground. Before planting, improve drainage if necessary by working in grit or sharp sand, especially on heavier soils. This grass is best planted as a pot-grown specimen rather than sown from seed, which can be unreliable for home gardeners. Plant in April, May, or September when the soil is workable and temperatures are mild. Dig a hole slightly larger than the root ball and set the plant at the same depth it sat in its pot—avoid burying the crown, as this can lead to rot. Space plants 30 cm apart to allow each clump to develop its characteristic airy form without crowding. After planting, firm the soil gently around the roots and water in thoroughly to settle the plant and eliminate air pockets. Once established, feather grass is remarkably drought-tolerant and requires little aftercare. In the first few weeks, water occasionally during dry spells to help roots establish, but avoid overwatering. A light mulch of gravel or grit around the base improves drainage and suppresses weeds, though organic mulches like compost are less suitable as they retain too much moisture. Staking is unnecessary; the fine, hair-like flower stems are designed to move gracefully in the breeze and will support themselves even in exposed positions.