Siberian bugloss 'Looking Glass' in April: monthly care

Brunnera macrophylla 'Looking Glass' thrives in partial or full shade, making it ideal for woodland-style borders, north-facing beds, or beneath deciduous trees. It tolerates a range of soils but performs best in moisture-retentive loam or clay. Avoid hot, dry spots; the large, silvery leaves scorch easily in full sun and dry conditions. Plant in March, April, September, or October when the soil is workable and temperatures are mild. Autumn planting allows roots to establish before winter, while spring planting gives a full growing season ahead. Prepare the soil by digging in plenty of organic matter—garden compost or well-rotted manure—to improve moisture retention and structure, especially if your soil is on the lighter side. Dig a planting hole slightly larger than the root ball and set the crown at the same level it was growing in the pot; planting too deep can lead to rot. Space plants 45 cm apart to allow for their mature spread of 40–60 cm. Brunnera spreads slowly by rhizomes, forming attractive clumps over time. Water thoroughly after planting to settle the soil around the roots and eliminate air pockets. Apply a 5 cm layer of mulch—leaf mould, composted bark, or garden compost—around the base, keeping it clear of the crown itself. This conserves moisture, suppresses weeds, and mimics the plant's natural woodland habitat. Keep the soil consistently moist for the first growing season while the root system establishes. Brunnera dislikes being moved once settled, so choose your planting spot carefully.

Brunnera macrophylla 'Looking Glass' is a low-maintenance perennial once established, but consistent moisture is key to keeping the foliage looking good. Water regularly during dry spells, especially in spring and summer when the plant is in active growth. The large leaves lose moisture quickly, and prolonged drought causes scorching and wilting. In shaded spots with moisture-retentive soil, rainfall is often sufficient, but check weekly during dry periods. Water deeply at the base rather than overhead to reduce the risk of mildew on the foliage. Feed in March or April as new growth begins. A general-purpose granular fertiliser such as blood, fish and bone, scattered around the base at the rate recommended on the packet, is ideal. Alternatively, apply a 3–5 cm top-up of garden compost or well-rotted manure as a mulch; this feeds the soil gently and improves moisture retention. Avoid high-nitrogen feeds later in the season, which promote soft growth vulnerable to frost and disease. Brunnera is fully hardy in zones 3–8 and needs no winter protection in temperate Europe. Mulch around the crown in autumn with leaf mould or compost to insulate roots and suppress weeds, but keep mulch clear of the crown itself to prevent rot. Slugs and snails are the main pests, particularly in spring when tender new leaves emerge. Use organic pellets, beer traps, or hand-pick in the evening. Powdery mildew can appear on foliage in dry conditions or overcrowded plantings; improve air flow and water consistently to minimise this. Remove affected leaves promptly. Otherwise, brunnera is largely trouble-free and will form slowly expanding clumps year after year with minimal intervention.

Brunnera macrophylla 'Looking Glass' is a low-maintenance perennial once established, but consistent moisture is key to keeping the foliage looking good. Water regularly during dry spells, especially in spring and summer when the plant is in active growth. The large leaves lose moisture quickly, and prolonged drought causes scorching and wilting. In shaded spots with moisture-retentive soil, rainfall is often sufficient, but check weekly during dry periods. Water deeply at the base rather than overhead to reduce the risk of mildew on the foliage. Feed in March or April as new growth begins. A general-purpose granular fertiliser such as blood, fish and bone, scattered around the base at the rate recommended on the packet, is ideal. Alternatively, apply a 3–5 cm top-up of garden compost or well-rotted manure as a mulch; this feeds the soil gently and improves moisture retention. Avoid high-nitrogen feeds later in the season, which promote soft growth vulnerable to frost and disease. Brunnera is fully hardy in zones 3–8 and needs no winter protection in temperate Europe. Mulch around the crown in autumn with leaf mould or compost to insulate roots and suppress weeds, but keep mulch clear of the crown itself to prevent rot. Slugs and snails are the main pests, particularly in spring when tender new leaves emerge. Use organic pellets, beer traps, or hand-pick in the evening. Powdery mildew can appear on foliage in dry conditions or overcrowded plantings; improve air flow and water consistently to minimise this. Remove affected leaves promptly. Otherwise, brunnera is largely trouble-free and will form slowly expanding clumps year after year with minimal intervention.