Blue and purple garden flowers
Polemonium 'Snow and Sapphires' - Clean white variegation surrounds the larger fern-like leaflets. The foliage mound gives up sky-blue flowers whose fragrance can be enjoyed from 4 feet away. Deadheading can encourage rebloom. It has rebloomed 3 times here with deadheading.
Monkshood - Supposedly the 'quintessential plant of the occult'. It has beautiful purple flower spikes. It was used in combination with belladonna to make a flying ointment, and in combination with water parsnip, cinquefoil, belladonna, and soot to make an ointment of the imagination, that allowed witches to contact the other side. It contains the deadly poison aconitine, which slows heart rate, decreases blood pressure, and numbs pain.
UK wild flowers: Fritillary (Fritillaria meleagris ) This is maybe the most exotic flower, its chequered bells look like stained glass when the light shines through them, each pale cell outlined by a darker frame. The reason fritillaries are now so rare is that, as bulbs, they can be destroyed by just one ploughing of a site where they may have been for centuries. Photograph: Jonathan Buckley