Large-flowered selfheal
Prunella grandiflora · Lamiaceae
📷 Josep Gesti · CC BY-SA 4.0
The gardener's calendar
Ideal time to plant large-flowered selfheal: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Scientific name
- Prunella grandiflora
- Family
- Lamiaceae (Mint family)
- Type
- Perennial herbaceous plant
- Adult height
- 30 to 40 cm
- Flowering
- May to August
- Light exposure
- Partial shade to full sun
- Hardiness
- Very hardy (down to -15 °C)
- Origin
- Temperate Europe and Asia
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability high.
Expert tips
The key tip
Pinch the stems in May to encourage branching and create a dense, bushy habit rather than a lanky growth. Excess stagnant moisture promotes powdery mildew: space plants well and ensure good air circulation.
The common mistake
Most gardeners let it get leggy by growing it in soil that's too rich or too shady, which severely reduces flowering.
The pro's trick
Divide the clumps every 3-4 years in autumn: you'll rejuvenate the plant and create vigorous specimens to give away.
Care
Light Exposure
Plant Large-flowered Self-heal in partial shade or full sun, ideally with 4 to 6 hours of direct light daily. It tolerates partially shaded areas well but flowers more generously with more light exposure. Avoid areas that are too hot and dry in Mediterranean climates.
Watering
Water regularly during the growing season (spring and early summer) to keep the soil moist but not waterlogged. Once established, this plant tolerates drought well. In winter, reduce watering and allow the soil to dry slightly between waterings.
Soil
Large-flowered Self-heal prefers well-draining, light to medium soil, preferably neutral to slightly acidic. Soil that is too rich in organic matter can promote foliage at the expense of flowering. Improve compacted soil with compost or sand to ensure good drainage.
Pruning and Maintenance
Pinch back stems in spring to encourage compact branching and better flowering. After summer flowering, remove faded flower spikes to extend blooming and maintain neat shape. Light pruning in late autumn helps the plant restart well in spring.
Fertilizer
Fertilizer is generally not necessary on properly prepared soil. You can apply a light balanced fertilizer in early spring or well-decomposed compost on the surface. Avoid over-fertilizing, which weakens the plant and reduces flowering.
Health and Pests
Large-flowered Self-heal is generally very robust. It is rarely affected by powdery mildew in case of stagnant humidity. Ensure good air circulation and avoid wetting the foliage. Rot problems are rare with good soil drainage.
Did you know?
Large-flowered Self-heal was traditionally used in European herbal medicine, notably in decoction for throat care. Its Latin name Prunella comes from the German word 'Brunelle,' which itself derives from 'braune' (brown), referring to the dark coloration of its flowers. This plant has been part of folk remedies for centuries, although no officially documented medical efficacy has been proven.
Where to buy it
Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.
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Tips generated and checked by Viridia — adapt them to your local climate.