Cirsium oleraceum (L.) Scop.
Cabbage Thistle, Siberian Thistle
Carduus acanthifolius, Carduus oleraceus, Carduus parviflorus, Carduus rigens, Carduus tataricus, Cirsium braunii, Cirsium flavescens, Cirsium pallens, Cirsium parviflorum, Cirsium praemorsum, Cirsium rigens, Cirsium subalatum, Cirsium thomasii, Cirsium variabile, Cnicus bracteatus, Cnicus oleraceus, Cynara colorata
Color: Pale yellow
Bloom Time: July to September
Cirsium oleraceum is a herbaceous, perennial plant growing up to 5 feet (1.5 m) tall. The stems are unbranched or with only a very few branches. The leaves are broad and ovoid, with a weakly spiny margin. The flowers are produced in dense flower heads which are up to 1.6 inches (4 cm) in diameter, pale yellow, but sometimes tinged pink.
USDA hardiness zone 6a to 10b: from −10 °F (−23.3 °C) to 40 °F (+4.4 °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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