When to plant Woodland sage 'Mainacht'?
Best month and method — Salvia nemorosa 'Mainacht'
Plant your woodland sage 'Mainacht' in March, April, May, September and October — 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 woodland sage 'Mainacht'
Salvia nemorosa 'Mainacht' thrives in full sun but tolerates partial shade, though flowering may be less profuse in shadier spots. It adapts to a wide range of soils—loam, sandy, or chalky—provided drainage is good. Heavy clay should be improved with grit or coarse sand before planting to prevent waterlogging, which this salvia dislikes. Plant in March, April, or May for the growing season ahead, or in September and October when the soil is still warm enough for roots to establish before winter. Space plants 35 cm apart to allow for their mature spread of 30–40 cm and to ensure good air circulation, which helps prevent mildew. Dig a hole slightly larger than the root ball and loosen the soil at the base to encourage roots to spread. Set the plant at the same depth it sat in its pot—burying the crown too deeply can lead to rot. Backfill with the excavated soil, firming gently to eliminate air pockets, and water thoroughly to settle the roots. After planting, apply a 3–5 cm layer of mulch around the base, keeping it clear of the stems. This conserves moisture and suppresses weeds while the plant establishes. Water regularly for the first few weeks, especially if planting in spring or during dry spells, until you see strong new growth. Autumn-planted salvias need less attention but should not be allowed to dry out completely before winter. No staking is required; the upright flower spikes of 'Mainacht' are sturdy enough to support themselves in all but the most exposed sites.