Cirsium rivulare Atropurpureum (3 × 9cm pots)

Deep crimson thistle-like flowers. Position: full sun Soil: moist, well-drained Rate of growth: average to fast-growing Flowering period: July to August Hardiness: fully hardy Spectacular, deep crimson thistles appear on erect stems in July and August above spiny, dark green leaves. This handsome, towering thistle is a valuable addition to a summer garden and looks equally at home in a wildflower meadow, beside water or in groups among other perennials. Although it will tolerate dry conditions and partial shade, it does best in a moist, sunny border. Garden care: Divide congested plants from autumn to spring and cut back to the ground in autumn to prevent self-seeding.