Cirsium rivulare 'Atropurpureum'
Plume Thistle, Brook Thistle
Color: Deep red
Bloom Time: Mid summer to late summer
Cirsium rivulare 'Atropurpureum' is an upright perennial with leafy stems, up to 4 feet (1.2 m) tall, forming a clump of branching, leafy stems with spherical, deep red flower-heads up to 1.2 inches (3 cm) across. The flowers appear from mid summer to late summer above spiny, dark green leaves.
USDA hardiness zone 5a to 9b: from −20 °F (−28.9 °C) to 25 °F (−3.9 °C).
How to Grow and Care
The seeds of Cirsium can be sown in either autumn or after the last frost of spring. They should be sown at a depth of 0.12 inch (3 mm). If grown indoors first then Cirsium takes about 2 to 3 weeks to germinate at a temperature of 70 to 75 degrees Fahrenheit (21 to 24 degrees Celsius). The seedlings should be planted out in early spring, when it is still possible to get a frost with a spacing of about 2 feet (60 cm).
Cirisium thrives in full sun and poor, average or reach soil that is moist but well drained. Plants require little care, but deadheading limits their tendency to self-sow. they generally self-sow only in moderation and unlike weedy thistles, the seedlings are easy to pull up. Use Thistles in mixed beds, herb gardens or meadowlike plantings… – See more at: How to Grow and Care for Thistles (Cirsium)
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