Dagkoekoeksbloem

Silene dioica

Engels: Red Campion

perennialCaryophyllaceae🇳🇱 Inheems

Dagkoekoeksbloem (Silene dioica) is a native to the Netherlands perennial from the Caryophyllaceae family that grows up to 80cm tall. This plant thrives in partial shade to shade and requires low maintenance. Blooms in spring and summer with pink flowers and attracts bees and butterflies.

Hoogte

30–80 cm

Breedte

20–40 cm

Zonligging

partial shade, full shade

Waterbehoefte

moderate

Grondsoort

loam, clay soil

Onderhoud

low maintenance

Bloeitijd

spring, summer

Bloemkleuren

pink

Ecologische waarde

Trekt bijen aan

🦋 Trekt vlinders aan

Verzorgingskalender

Taak	Jan	Feb	Mrt	Apr	Mei	Jun	Jul	Aug	Sep	Okt	Nov	Dec
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Care tips

Planting

Red campion is a woodland native that thrives in shady corners where many other perennials struggle. Choose a spot in partial or full shade—under deciduous trees, along a north-facing fence, or in the dappled light of a shrub border. It tolerates a range of soils but performs best in loam or clay that holds moisture without becoming waterlogged. Prepare the planting area by clearing weeds and working in a little garden compost if your soil is very poor or compacted, though red campion is unfussy and will establish in most garden conditions. The ideal planting times are March to April or September to October, allowing roots to settle before extremes of summer heat or winter cold. If planting pot-grown specimens, dig holes slightly larger than the root ball and set plants at the same depth they were growing in their pots. Space them 30 cm apart to allow for their eventual spread of 20–40 cm. Firm the soil gently around the roots and water in well. For direct sowing, scatter seed thinly on prepared soil in early spring or autumn, pressing it lightly into the surface—red campion seed needs some light to germinate, so don't bury it deeply. Water newly planted red campion regularly for the first few weeks until you see fresh growth, especially if planting in spring. A light mulch of leaf mould or well-rotted compost around the base helps retain moisture and suppresses weeds, but keep it clear of the stems themselves. Red campion self-seeds freely once established, so expect seedlings to appear in subsequent years if you leave a few flower heads to set seed.

Pruning

Red campion doesn't require formal pruning in the way a shrub does, but a bit of seasonal tidying keeps plants looking their best and can extend flowering. The main task is deadheading and cutting back spent stems in September or October, after the main flush of spring and summer blooms has finished. Once flowering tails off and seed capsules have formed, decide whether you want self-sown seedlings. If you do, leave some stems intact so seed can ripen and scatter naturally—red campion is a prolific self-seeder and will colonise shady spots happily. If you prefer to control spread, cut back all flowering stems to just above the basal rosette of leaves before seed is fully ripe. Use secateurs or garden shears for this job; the stems are soft and cut easily. In early autumn, remove any yellowing or tatty foliage to tidy the plant and reduce hiding places for slugs and snails over winter. Red campion is semi-evergreen in mild winters, so you'll often see a low rosette of leaves persisting through the cold months. Avoid cutting this back hard—just remove damaged or dead material. There's no need to prune in spring. Instead, simply clear away any winter-damaged leaves as new growth emerges. If clumps become congested after a few years, you can lift and divide them in early autumn rather than pruning, replanting vigorous outer sections and discarding the woody centre. This rejuvenates flowering and keeps plants healthy without any complicated cutting regimes.

Maintenance

Red campion is a low-maintenance perennial once established, well suited to naturalistic planting schemes and shady borders. Watering needs are moderate: keep soil evenly moist during the growing season, especially in prolonged dry spells in late spring and summer when plants are flowering. In autumn and winter, natural rainfall is usually sufficient, and established plants tolerate short periods of dryness thanks to their deep roots. Feeding is not necessary. Red campion evolved in nutrient-poor woodland soils and performs perfectly well without supplementary fertiliser. In fact, over-feeding can encourage soft, leafy growth at the expense of flowers and make plants more attractive to aphids. If your soil is very poor, a light mulch of leaf mould or garden compost in early spring provides gentle, slow-release nutrients and improves soil structure. Red campion is fully hardy across zones 3a to 8b, so no special winter protection is needed. Plants die back to a basal rosette in autumn and re-emerge reliably in spring. Mulching around the crown in late autumn helps suppress weeds and protects roots in colder winters, but isn't essential. Pests and diseases are rarely a problem. Slugs and snails may nibble young foliage in spring, particularly in damp, shady sites—use organic slug pellets, beer traps, or hand-picking if damage is severe. Aphids occasionally cluster on flower buds in early summer; a strong jet of water usually dislodges them, or tolerate low numbers as they attract beneficial insects. Red campion is generally disease-free, though powdery mildew can appear on leaves in very dry conditions—improve air circulation and water at the base rather than overhead if this occurs.