Cirsium muticum
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Hardiness Zone: 3-9 Height: 2-7 feet; 0.6-2.1 metres Sun: Full sun to part shade Water: Wet to medium wet Bloom Colour: Purple to pink Culture: Easily grown in wet to moist soils in full to partial sun. The size of individual plants can be highly variable, depending on moisture level, soil fertility, and competition from other plants. Noteworthy Characteristics: Swamp Thistle produces vibrant purple to pink flowers and is weakly armed compared to other thistles. It is biennial but will re-seed in appropriate habitat. It is best grown in full sun to moderate shade on wet soils.