Buddleja davidii or the butterfly bush as it is often known is a popular garden plant that originated in central China.
It grows easily from seed so is a natural coloniser of wasteland, hence it is sometimes called the bombsite plant.
Nectar rich flowers are produced from July to September which attract insects particularly butterflies.
In the wild they have purple flowers but over 100 cultivars have been developed with flowers ranging from white through pink to deep purple.
Planting a buddleja is a simple way to attract butterflies to your garden. The ones in the nature centre and walled garden are providing food for a lot of bees but there are very few butterflies around as the weather this year has been so cold and wet.