Eryngium yuccifolium

button eryngo

• Position: full sun
• Soil: moist, well-drained soil
• Rate of growth: average
• Flowering period: July to September
• Flower colour: steel blue, whitish or green
• Other features: interesting foliage
• Hardiness: fully hardy
  
  An evergreen Eryngium, which forms a clump of bluish-green, strap-shaped leaves that have a serrated and spiny edge. In mid summer and autumn, upright, branching flowerspikes emerge bearing rounded or oval shaped flower clusters, which turn shades of greyish-blue, cream or green as they open. A variable plant, which originates from the Eastern States of the US, it is tolerant of poor soil and drought once established.
  
  
• Garden care: Lift and divide large colonies in spring. Avoid the temptation to cut back the flowerheads in autumn as they provide interest in the winter garden.