Purple toadflax in May: monthly care

Vlasleeuwenbek thrives in full sun or partial shade and tolerates a wide range of well-drained soils, including loam, sandy, and chalky types. It's particularly happy in lighter, free-draining ground and will struggle in heavy clay that stays wet. Choose a spot where it can self-seed freely if you want a naturalistic effect, or somewhere you can easily remove unwanted seedlings. Plant container-grown plants in March, April, or May for establishment before summer, or in September and October to take advantage of autumn rains and give roots time to settle before winter. Space plants 30 cm apart to allow for their upright, clumping habit and 30–45 cm spread at maturity. Prepare the soil by removing weeds and digging in a little garden compost or grit if drainage is poor, but avoid over-enriching the ground—vlasleeuwenbek performs best in moderately fertile conditions and can become floppy in overly rich soil. Dig a planting hole slightly larger than the root ball, set the plant at the same depth it sat in its pot, and firm the soil gently around the roots. Water thoroughly after planting to settle the soil and eliminate air pockets. A light mulch of gravel or grit around the base helps suppress weeds and improves drainage at the crown, which is especially useful on heavier soils. Avoid organic mulches that retain too much moisture. Newly planted vlasleeuwenbek needs regular watering for the first few weeks, but once established it is quite drought-tolerant and requires little fuss.

Once established, vlasleeuwenbek is a low-maintenance perennial that tolerates dry spells well. Water newly planted specimens regularly during their first growing season, but mature plants need watering only during prolonged dry periods in summer. Overwatering or waterlogged soil can lead to root rot, so err on the side of dryness, especially in winter. Feed lightly in April or May with a balanced general-purpose fertiliser or a handful of blood, fish, and bone scattered around the base of the plant. Avoid high-nitrogen feeds, which promote soft, leafy growth at the expense of flowers and can make stems flop. Vlasleeuwenbek is adapted to lean soils and doesn't need heavy feeding—in fact, too much fertility reduces flowering and shortens the plant's lifespan. Vlasleeuwenbek is fully hardy in zones 5–9 and needs no winter protection in temperate Europe. It's evergreen or semi-evergreen in mild winters, though foliage may die back in colder spells. A gravel mulch around the crown helps prevent winter wet from rotting the base, particularly on heavier soils. Pests are rarely a problem. Slugs and snails may nibble young growth in spring, but established plants are generally left alone. Powdery mildew can occasionally appear on foliage in dry summers with poor air circulation; remove affected leaves and avoid overhead watering. Self-seeding can be prolific—weed out unwanted seedlings in spring or autumn to prevent overcrowding.