English lavender 'Munstead' in August: monthly care

Lavandula angustifolia 'Munstead' needs pruning twice a year to stay compact, floriferous, and long-lived. The first and most important prune happens in March or April, just as new green shoots appear at the base of the old stems. Using clean, sharp secateurs or shears, cut back all the previous year's growth by about one-third to one-half, shaping the plant into a low, rounded mound. Always cut into the leafy green growth, never back into bare, woody stems—lavender rarely regenerates from old wood and a hard cut into brown stems can kill the plant. This spring prune encourages bushy new growth and plenty of flower spikes. The second prune comes in August, immediately after the main flowering flush. Deadhead by cutting off all the spent flower stalks along with an inch or two of leafy stem beneath them. This tidy-up prevents the plant wasting energy on seed production, keeps it neat, and often triggers a modest second flush of late-summer flowers. Again, stay in the green growth. If you've inherited an old, leggy lavender with a bare, woody base, renovation is risky; it's usually better to take cuttings and start afresh. Young plants respond well to pruning, so begin the routine in the first spring after planting. Use sharp tools to avoid bruising stems, and choose a dry day—wet foliage and open cuts invite fungal disease.

Once established, 'Munstead' lavender is remarkably self-sufficient. Water sparingly: in a typical year, rainfall alone suffices. During prolonged summer drought, a deep soak every two to three weeks is enough—overwatering causes root rot and yellowing foliage. In autumn and winter, stop watering entirely unless the plant is in a container. Feed lightly in March or April with a general-purpose granular fertiliser, such as blood, fish and bone, scattered around the base at a handful per plant. Alternatively, use a slow-release balanced feed. Avoid high-nitrogen fertilisers, which promote soft, sappy growth prone to frost damage and poor flowering. Lavender evolved on poor Mediterranean hillsides and actually flowers better in lean soil, so resist the urge to overfeed. 'Munstead' is evergreen and fully hardy in zones 5–9, requiring no winter protection in temperate Europe. Good drainage is far more critical to winter survival than cold itself—wet soil kills lavender faster than frost. In exposed gardens, a gravel mulch helps, but avoid covering the foliage. Pests are few: rosemary beetle and its larvae occasionally chew foliage in late summer; pick them off by hand. The main disease risk is root rot (Phytophthora) in poorly drained soil, which causes sudden wilting and browning. Prevention is key—there's no cure once rot sets in. Powdery mildew can appear in humid, crowded conditions; ensure good air circulation and avoid overhead watering. Harvest flower spikes in June, July or August just as the lowest florets open, cutting in the morning after dew has dried for the best fragrance.

Once established, 'Munstead' lavender is remarkably self-sufficient. Water sparingly: in a typical year, rainfall alone suffices. During prolonged summer drought, a deep soak every two to three weeks is enough—overwatering causes root rot and yellowing foliage. In autumn and winter, stop watering entirely unless the plant is in a container. Feed lightly in March or April with a general-purpose granular fertiliser, such as blood, fish and bone, scattered around the base at a handful per plant. Alternatively, use a slow-release balanced feed. Avoid high-nitrogen fertilisers, which promote soft, sappy growth prone to frost damage and poor flowering. Lavender evolved on poor Mediterranean hillsides and actually flowers better in lean soil, so resist the urge to overfeed. 'Munstead' is evergreen and fully hardy in zones 5–9, requiring no winter protection in temperate Europe. Good drainage is far more critical to winter survival than cold itself—wet soil kills lavender faster than frost. In exposed gardens, a gravel mulch helps, but avoid covering the foliage. Pests are few: rosemary beetle and its larvae occasionally chew foliage in late summer; pick them off by hand. The main disease risk is root rot (Phytophthora) in poorly drained soil, which causes sudden wilting and browning. Prevention is key—there's no cure once rot sets in. Powdery mildew can appear in humid, crowded conditions; ensure good air circulation and avoid overhead watering. Harvest flower spikes in June, July or August just as the lowest florets open, cutting in the morning after dew has dried for the best fragrance.