Aconitum napellus (Monkshood):
Dark blue hooded flowers over finely divided foliage. This Aconitum flowers early, in late spring/early summer. Height to 1.5m. Hardy.
[Collect Only]
Amsonia hubrichtii (Hubricht's bluestar):
Clumps of soft feathery green foliage and palest blue star-like flowers in late Spring. Textural plant. Attractive autumn colour. Up to 60cm. Hardy
Cichorium intybus (Wild chicory):
Beautiful cornflower-blue flowers held on tall stems in late summer. May need support. Hardy. Up to 2m.
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]