Centaurea ragusina growing 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.
Centaurea ragusina flower
Flower color yellow, the flowers petals like little horns base that divide several needle shape, the petals “sit” on green “ball” with spines on it.
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How to grow Centaurea ragusina growing and care:
Drained soil, moist soil, cool winter
What is the best way to start growing?
Plant / Seedling / Seed
Is it necessary to graft or use vegetative reproduction?
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
How to prune:
Prune dead leaves and flowers
Size of the plant?
20-60 cm (8-24 inches)
Growth speed in optimal condition:
Small amount of water
Light conditions in optimal condition for growing:
Is it possible to grow indoor as houseplant?
Growing is also possible in a planter /flowerpot / containers:
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.