Hakone grass in May: monthly care

Hakonechloa macra thrives in partial to full shade, making it an excellent choice for the shadier corners of your garden where many grasses struggle. It tolerates a wide range of soil types—loam, sandy soil, and clay—but the ground must be moisture-retentive yet well-drained. Avoid planting in dry, exposed positions or heavy, waterlogged clay that stays wet in winter. Plant in spring (March to May) or early autumn (September to October). Spring planting gives the roots a full growing season to establish before winter, while autumn planting works well if the soil is still warm and not waterlogged. Prepare the site by digging in plenty of organic matter—garden compost or well-rotted manure—to improve both drainage and moisture retention, especially in sandy or heavy clay soils. Dig a planting hole slightly larger than the root ball and set the plant at the same depth it was growing in its pot. Space plants 45 cm apart; Hakonechloa spreads slowly to form a low mound 40–60 cm wide, so don't be tempted to crowd them. Firm the soil gently around the roots and water thoroughly to settle the plant in. After planting, apply a 5 cm layer of mulch—bark chips or leaf mould work well—around the base to conserve moisture and suppress weeds. Keep the soil consistently moist through the first growing season, especially during dry spells in spring and summer. Hakonechloa is slow to establish and can sulk if allowed to dry out in its first year, so attentive watering in year one pays dividends later.

Hakonechloa macra is a low-maintenance grass once established, but it does appreciate consistent moisture, especially in its shadier habitats where competition from tree roots can be fierce. Water regularly during dry spells in spring and summer, aiming to keep the soil evenly moist but not waterlogged. In autumn and winter, rainfall is usually sufficient, but check plants growing under dense tree canopies or against house walls, as these spots can stay surprisingly dry. Feed in April or May as new growth begins. Apply a balanced granular fertiliser (such as blood, fish and bone or a general-purpose feed like Growmore) around the base at the rate recommended on the packet, then water in well. A single spring feed is enough; Hakonechloa isn't a heavy feeder and too much nitrogen can lead to lush, floppy growth. Mulch annually in spring after feeding. A 3–5 cm layer of garden compost, leaf mould, or bark chips helps retain moisture, suppresses weeds, and gradually improves soil structure. Keep mulch clear of the crown itself to avoid rotting the base of the plant. Hakonechloa is fully hardy in zones 5–9 and needs no winter protection in temperate Europe. The clump may take a year or two to reach its full size, as it spreads slowly by short rhizomes, but patience is rewarded with a neat, weed-suppressing mound. Pests and diseases are rare. Slugs occasionally nibble young shoots in spring, so scatter slug pellets or use beer traps if damage is severe. Rust can appear as orange spots on the foliage in humid summers, but it's seldom serious; simply remove affected leaves and ensure good air circulation.