Eryngium planum 'Kolmpurst'
A robust, clump-forming perennial to around 90cm in height, with rounded, silvery grey-green spikey leaves. Clusters of small purple and blue flowerheads appear above narrow, spiny silvery-green bracts on upright, branched silver stems, in mid and late summer
| Season | Stem | Flower | Foliage | Fruit |
|---|---|---|---|---|
| Spring | ||||
| Summer | ||||
| Autumn | ||||
| Winter |
Grow in dry, well-drained poor to moderately fertile soil in full sun, with protection from winter wet
Propagate by seed in containers in a cold frame as soon as ripe; insert root cuttings in late winter; propagate by division during spring, although they may be slow to re-establish
Tidy plants after flowering; ideal for flower arranging - cut the stems before the flowers are fully open
May be susceptible to leaf and bud eelworms, and slugs and snails
May be susceptible to root rot and powdery mildews