Eryngium Pen Blue
This perennial evergreen thistle has bright-blue flowers and grey-green foliage.
0.50
-15 
0.25
Sun Use
In shrubberies or flowerbeds.
Planting
Plant in full sun and light, well-drained soil.
Maintenance
At the end of autumn, prune the thistle to 5cm from the ground and mulch in preparation for winter. New shoots will appear in spring at the base of the plant.
