Eryngium 'Blue Sea Holly'
Tolerant of the toughest conditions, `Blue Sea Holly' may require staking or support in rich soils. This spiky, architectural character adds interest to our sunny border with its colourful stems and spiny-toothed leaves surrounding the domed blue cones. It looks wonderful planted amongst agastache and coneflowers. Also a superb cut flower, beloved of florists.
Eryngiums love poor soils in hot dry conditions. Plant in full sun for maximum flower colour. Protect from frost. Cut back to the ground in late winter to encourage fresh new growth in spring and abundant flowering in early summer. Drought tolerant. Avoid transplanting. Tolerant of the toughest conditions, including coastal sites and poor soils. Good drainage is essential, especially in winter. Stake if necessary in fertile soils, and plant in multiples or among other perennials for support.