Catananche caerulea (Cupid's dart):
Masses of papery lavender blue flowers held on wiry stems all summer. Seed heads turn silver in late summer. Good dried flower. Up to 60cm.
Eryngium 'Pen Blue' (Sea Holly 'Pen Blue):
Electric-blue thistle-like flowers with a spiky collar and silvery-green foliage. Long flowering and attractive to bees. Hardy. Up to 60cm.
Eryngium planum 'Blue Hobbit' (Sea Holly 'Blue Hobbit'):
A more compact form with steely blue flowers on dark stems. Spiny glaucous foliage. Loves sunshine and very well-drained gritty soil. Hardy. Up to 30cm.
[Collect Only]