Also known as
Scotch Thistle, Argentine Thistle, Down Thistle, Giant Thistle, Musk Thistle, Oak Thistle, Queen Mary's Thistle, Silver Thistle, Star Thistle, Thistle-Upon-Thistle, Heraldic Thistle, Woolly Thistle, Scottish thistle
3 years to reach maturity
More images of Cotton Thistle
Cotton Thistle Overview
Onopordum acanthium is a biennial species with an upright growth habit, typically reaching a height of around 3m. Also known by the common names cotton thistle, Argentine thistle and down thistle amongst many others. Foliage is oblong in shape and grey in colour, leaves are spiny and cobwebby and measure around 30cm long. Flowers are rounded and thistly, coloured purple and these measure approximately 5cm across. This species is part of the Royal Horticultural Society “Plants for Pollinators” initiative to showcase plants which support pollinator populations by providing ample amounts of nectar and/ or pollen. A great choice for encouraging pollinating insect wildlife into your garden!
How to propagate Cotton Thistle
Sow in autumn or spring.
Special features of Cotton Thistle
Other uses of Cotton Thistle
Ornamental, wildflower/meadow, border, under shrubs