When to plant Japanese Blood Grass?
Best month and method — Imperata cylindrica 'Red Baron'
Plant your japanese Blood 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
35 cm
≈ 8 plants
For an X m² border, calculate: X × 8 plants.
Step by step: plant japanese Blood Grass
Japanese blood grass thrives in full sun or partial shade, though the best red colouring develops in a sunny position with at least six hours of direct light daily. It adapts to most well-drained soils but performs particularly well in loam or sandy soil that doesn't stay waterlogged. Avoid heavy clay unless you improve drainage with grit or organic matter. Plant in April, May, or September when the soil is workable and temperatures are mild. Spring planting gives the grass a full growing season to establish, while autumn planting works well if the soil isn't too wet. Dig a hole slightly larger than the root ball and loosen the soil at the base to encourage root spread. Set the plant at the same depth it was growing in its pot—planting too deep can smother the crown. Space plants 35 cm apart for a continuous drift or groundcover effect. If you're planting a single specimen or small group, the same spacing applies between individual clumps. After planting, firm the soil gently around the roots to eliminate air pockets, then water thoroughly to settle the plant in. Apply a 5 cm layer of mulch around the base, keeping it a few centimetres clear of the crown to prevent rot. This conserves moisture and suppresses weeds while the grass establishes. Water regularly for the first six to eight weeks, especially in dry spells, until you see new growth emerging. Once established, Japanese blood grass is reasonably drought-tolerant but looks best with consistent moisture during the growing season.