Posted: 21/04/2014 at 15:20
Hi all, after just checking my delphiniums, I noticed several growing tips had leaves which had been tied into distorted shapes by the silk of small caterpillars of the Delphinium moth, so I recommend you check yours asap. These caterpillars will eat the flower shoots while they are small resulting in no blooms. The easiest way to deal with them is to squash the distorted area between thumb and fingers - if you feel a slight .'pop', that's one caterpillar dealt with! These pests overwinter inside the hollow stems, so best cut those to the ground at the end of the season. Despite doing this last year, they have appeared again so vigilance is probably the best answer.