Knapweed in summary :
Latin name : Centaureasp.
Common name : Knapweed
Family : Asteraceae
Type : Perennial
Harbor : In tuft
Height : 20 to 120 cm
Planting density : 3 to 8 feet depending on the species
Exposure : Sunny
Ground : Any type, but well drained
Flowering : From May to September depending on the species
Knapweed is a kind of perennial that offers plants with many faces. Not fearing drought or limestone soils, knapweed allows the most restrictive gardens to flourish.
The knapweed adores the Sunand is not difficult on the nature of the soil, as long as it is well drained.
- In spring or fall, plant your feet with 30 to 60 cm apartbetween each.
The larger the plant at maturity, the greater the gap should be.
When these rules are followed, there is no no planting difficulties for the Centaurea.
Maintenance of knapweed
Very simple, the maintenance is reduced to cut dead flowersto promote new flowering. In early spring, fold back the footto remove dead leaves or any frost damage.
Multiplication of knapweed
You have two options for multiplying knapweed: divisionwhere the sowing.
For to divideyour knapweed, pull it out with a spade and then divide the root ball. Then replant the newly obtained feet.
The Centaureais a perennial that is generously reseeded. If you want to multiply it, you can then take the natural seedlingsto then transplant them elsewhere.
Diseases and pests
The slugs and snailscan attack young shoots. A preventive barrier solves the problem.
Knapweed is also susceptible topowdery mildew.
If your foot is affected, do not hesitate to cut it back and then water it regularly until new vegetation appears.
Employment and association
The knapweed will also like massive, pot, rockeryor border. It's up to you to adapt the species to the desired use.
Centaureacan be associated with perennials with similar foliage and flowering: sagebrush, sage, lavender.
With its bright yellow, a Sedum acrecould also work wonders alongside any knapweed; just like the Pennisetumin bloom that would marry beautifully with the inflorescences of Centaurea montana.
Some interesting species and varieties
Centaurea macrocephala :
Very original for its yellow flowers, it is also one of the largest knapweeds at 1.20 m. Blooms in July, August.
Centaurea pulcherrima :
Its pretty purple flowers with a whitish heart and its pubescent grayish foliage make it one of the prettiest knapweeds. Blooms from May to July.
Centaurea montana :
Perhaps the most common knapweed in gardens, it features finely cut purplish-blue flowers.
A classic that blooms from May to July. It also exists with a white flowering under the cultivar "Alba".