How to grow Centaurea ragusina

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.

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

Pruning season:

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?

Growing is also possible in a planter /flowerpot / containers:

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.

Scientific name:

Centaurea ragusina

How to grow Centaurea ragusina

Growing Centaurea ragusina plant

Centaurea ragusina plant care

Centaurea ragusina flower

Centaurea ragusina


Blooming Seasons
  • Spring flowers
  • Summer flowers
Flower colors
  • Yellow flower
  • Mediterranean Climate
  • Subtropics Climate
  • Temperate Climate
Leaf color
  • Gray leaves
  • White leaves
Ornamental parts
  • Ornamental flower
  • Ornamental leaves
  • Ornamental plant
Plant growing speed
  • Average growing plants
Plant life-form
  • Deciduous
  • Herbaceous
  • Perennial plant
Plant Uses
  • Colored leaves
  • Ornamental plants
Planting Season
  • Autumn Planting
  • Spring Planting
  • Summer planting
Plants sun exposure
  • Full sun Plants
Watering plants
  • Small amounts of water
Hardiness zone
  • Hardiness zone 10
  • Hardiness zone 11
  • Hardiness zone 8
  • Hardiness zone 9