Large-flowered Selfheal - Prunella grandiflora - Vivid summer colour for garden borders - Fresh Seeds

Large-flowered selfheal (Prunella grandiflora) is a hardy perennial that brings rich, lively colour and long-lasting charm. Its low, dense clumps with gently trailing stems create an attractive, natural ground cover, while the rounded flower heads catch the eye from early summer through to early autumn. Reaching about 10-20 cm in height, it works beautifully in borders, rock gardens, containers, and as a spreading cover plant. A mix of shades including purple, pink, blue, and white helps create a cheerful, harmonious display that looks natural and well balanced.

Sowing depth

Sow the seeds shallowly at around 0.3 cm deep. This supports quick, even germination. Avoid sowing too deeply, then lightly cover the seeds and keep the compost consistently moist until seedlings appear.

When to sow under cover

The best time to sow under cover is from April to May, when stable warmth and moisture help young plants develop quickly.

Planting out

Plant well-rooted young plants into their final position from July to August. At this stage they are established and better able to cope with changing weather. Large-flowered selfheal settles in quickly and soon forms compact, low clumps. After a few weeks it starts to spread, filling gaps with a natural-looking carpet.

Spacing

Space plants about 20 x 25 cm apart. This gives them room to grow, improves airflow, and helps limit weeds. Within a year of planting, the plants can easily cover the intended area.

Flowering period

Large-flowered selfheal flowers for a long time, from June to September. During this period the garden is filled with colourful blooms that are both decorative and useful, attracting bees, bumblebees, and butterflies and supporting biodiversity.

Growing

This is a rewarding, easy-care plant. It grows well in full sun or light shade in free-draining, moderately moist soil. It tolerates frost and dry spells, so it suits less demanding conditions too. It is ideal for natural-style plantings, rock gardens, border edges, and containers. With its long flowering season, it stays attractive for much of the year and adds a gentle, natural touch to any garden.

Why buy from GardenSeedsMarket

Choosing seeds from GardenSeedsMarket means you receive carefully checked seed of excellent quality. Each batch is tested for germination and varietal purity. Secure packaging and fast, safe delivery help ensure the seeds arrive in perfect condition. The GardenSeedsMarket team is happy to offer practical advice on choosing plants and growing them well, so you can enjoy healthy plants and colourful displays that last.

Pack contents

The pack contains 0.1 g of seeds. The packaging includes key growing guidance and a sow-by date.