Plant Encyclopedia
Everything about care, pruning, watering and winter hardiness of thousands of plants
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2 plants
Rough star-thistle: complete guide
Centaurea aspera
Discover Centaurea aspera (Rough star-thistle). A Mediterranean shrub with purple flowers. Perfect for dry, sunny gardens.
12 min
Red star-thistle: complete guide
Centaurea calcitrapa
Red star-thistle (Centaurea calcitrapa) is a striking plant from the aster family with distinctive spines and purple flowers. Learn how to grow this Mediterranean plant in temperate gardens.
12 min