Fourstamen chickweed
Cerastium diffusum · Caryophyllaceae
The gardener's calendar
Ideal time to plant fourstamen chickweed: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Family
- Caryophyllaceae
- Plant type
- Annual or biennial herbaceous plant
- Adult size
- 10 to 30 cm in height
- Flowering
- Spring to summer (April-July)
- Foliage
- Deciduous, fine and hairy
- Hardiness
- Very hardy, tolerates severe winters
- Exposure
- Full sun to partial shade
- Origin
- Europe and Mediterranean regions
Care
Exposure and light
Diffuse chickweed thrives in direct sunlight, where it displays the best flowering. However, it tolerates partial shade without major issues. Install it in a well-aerated spot to prevent stagnant moisture and promote its robustness.
Soil and substrate
This plant prefers well-draining soil, even poor or rocky soil. It adapts easily to dry and rocky soils, typical of rock gardens or alpine gardens. Avoid overly compact soils or those regularly waterlogged.
Watering
Water moderately during growth, especially during prolonged drought. Once established, this plant tolerates drought well. Reduce watering in winter to respect its dormancy and prevent rot.
Pruning and maintenance
No pruning is strictly necessary. You can trim lightly after flowering to maintain a compact shape and encourage a bushy habit. Remove spent flowers to extend blooming.
Fertilization
Diffuse chickweed is not particularly demanding. Light application of balanced fertilizer in spring is sufficient. On poor soil, a single application at the start of the growing season is recommended; on fertile soil, fertilizer can be omitted.
Diseases and pests
This robust plant resists disease well. Watch for collar rot in case of excessive humidity or poor drainage. A few minor pests may occasionally settle on it, but without causing significant damage.
Did you know?
The genus Cerastium, to which diffuse chickweed belongs, takes its name from the Greek 'keras' (horn), referring to the elongated and tapered shape of its seed capsules. Long considered a simple plant of wastelands, diffuse chickweed has become appreciated by rock garden enthusiasts, thanks to its compact habit and delicate white flowers that brighten Mediterranean and alpine gardens.
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.
Add this plant to my garden →Plants from the same family
- Smooth rupturewortHerniaria glabra
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- Snow-in-summerCerastium tomentosum
- Sticky CatchflyViscaria vulgaris
- Creeping baby's breathGypsophila repens
- Mountain sandwortArenaria montana
Tips generated and checked by Viridia — adapt them to your local climate.