Centaurea ragusina grow and care – herbaceous of the genus Centaurea also known as Silver Knapweed, Centaurea ragusina perennial deciduous used as ornamental plant, can grow in mediterranean, subtropics or temperate climate and growing in hardiness zone 8-11.
Leaves color grey to white in pinnate shape deeply lobed.
What is the best way to start growing? Plant / Seedling / Seed
Is it necessary to graft or use vegetative reproduction? No
Difficulties or problems when growing: Spines on the flowers
Recommended planting season? Spring, summer in USDA zone 8-11, Autumn, winter, spring 10-11
Pests and diseases: Powdery mildew, aphids
Pruning season: Winter
How to prune: Prune dead leaves and flowers
Size of the plant? 20-60 cm (8-24 inches)
Growth speed in optimal condition: Medium growing
Water requirement: Small amount of water
Light conditions in optimal condition for growing: Full Sun
Is it possible to grow indoor as houseplant? No
Growing is also possible in a planter /flowerpot / containers: Yes
Blooming information
Bloom season: Spring / Summer
General information about the flower Yellow flowers petals like little horns base that divide several needle shape, the petals “sit” on green “ball” with spines on it.
