When to plant Flat sea holly 'Blue Hobbit'?

Eryngium planum 'Blue Hobbit' thrives in full sun and free-draining soil, making it ideal for gravel gardens, sunny borders, and Mediterranean-style plantings. It tolerates sandy, loamy, and chalky soils but abhors waterlogged conditions, so avoid heavy clay unless you improve drainage substantially. If your soil is prone to sitting wet, dig in plenty of grit or coarse sand before planting. Plant 'Blue Hobbit' in March, April, or May for establishment before summer, or in September and October when soil is still warm and autumn rains help roots settle in. Space plants 30 cm apart to allow for their compact spread of 25–35 cm. Dig a hole slightly larger than the root ball, set the crown at soil level—never bury it deeply—and backfill with the excavated soil mixed with a handful of grit if drainage is questionable. Water thoroughly immediately after planting to settle roots and eliminate air pockets, but thereafter be sparing. This eryngium is drought-tolerant once established and resents constant moisture. A thin mulch of gravel or fine grit around the crown improves drainage, suppresses weeds, and suits the plant's preference for sharp conditions. Avoid organic mulches like bark or compost, which retain too much moisture and can encourage crown rot. Staking is unnecessary; 'Blue Hobbit' is a sturdy, compact cultivar that stands well even in exposed sites. If planting in autumn, avoid feeding until the following spring to prevent soft growth before winter.