Fishbone thistle (Ptilostemon diacantha)
Fishbone thistle is a rosette-forming, evergreen biennial or short-lived perennial with long, narrowly lance-shaped, lobed, spiny, white-veined, grey-green leaves and upright, branching stems bearing clusters of purple, thistle-like flowers in summer.
Winterhardy evergreen short-lived perennial
Height 50 cm
Width 50-60 cm
Spacing 30-50 cm (5 pc/m2)
Flowering time VII-VIII
Site sunny, dry to medium moist, well drained soil.
Usage solo plant, groups