Posted: 25/06/2013 at 21:12
If they are growng well but the flowers are being eaten before blooming, check for caterpillars of the delphinium moth. They wrap a leaf or two around themselves for protection which is how to spot them. If you find any, squash them between the leaves they are hiding in. To prevent them next year, cut the plants right down to the ground at the end of the year as the larvae overwinter inside the hollow dead stems.