When to plant Masterwort 'Roma'?

Astrantia major 'Roma' thrives in partial shade or full sun, though it performs best with some afternoon shade in warmer gardens. Choose a spot with loam or clay soil that retains moisture without becoming waterlogged. Before planting, dig over the soil to a spade's depth and work in plenty of organic matter—well-rotted compost or manure—to improve structure and moisture retention, especially if your soil is on the lighter side. Plant container-grown astrantias in March, April, September, or October. Autumn planting gives roots time to establish before winter, while spring planting suits colder or wetter sites. Dig a hole slightly wider than the root ball and the same depth, ensuring the crown sits level with the surrounding soil surface. Space plants 40 cm apart to allow for their mature spread of 40–50 cm; this spacing also encourages good air circulation. After planting, firm the soil gently around the roots and water thoroughly to settle the plant in and eliminate air pockets. Apply a 5 cm layer of organic mulch—leaf mould, garden compost, or well-rotted manure—around the base, keeping it clear of the crown itself to prevent rot. This mulch conserves moisture and suppresses weeds, both important for astrantias, which dislike drying out. Water regularly during the first growing season until the plant is fully established. Astrantia major 'Roma' is hardy to zone 4 and will tolerate winter cold without protection in temperate Europe. No staking is usually needed; the stems are sturdy enough to support the distinctive pink-to-red pincushion flowers that appear from early summer onwards.