Gardeners' World Web User
17/09/2008 at 09:24
Despite its reputation as a butterfly magnet, buddleja is a very poor nectar source for butterflies, bumblebees or hoverflies. I've never quite worked out exactly why this should be so, since I too have memories of the purple spikes dripping with brightly coloured butterflies. I wonder whether it is linked to the fact that buddleja is a deep-rooted thug of a plant. After a hot dry summer many nectar sources have dried up leaving buddleja, with its tenacious grip on the water table, able to get enough water to produce some nectar. Most years, however, buddleja is easily out-competed in the insect-visitor stakes by simple garden staples like orpine, golden rod and even thistles.