Here are five of my favourite dye and ink plants. These are all plants you can easily grow in the UK. Buddleia - This is a perennial woody shrub/tree that grows commonly in urban industrial edges and gardens. The flowers start to bloom in June and continue throughout the Summer. The flowers are very abundant making it possible to gather large quantities without depleting the supply for the butterflies and bees who also love them. All the flowers, regardless whether they are pink, white, or yellow give a bright yellow dye. This is effective with an aluminium based mordant on silk and wool. You can also do bundle dyeing with the flowers as the flowers release their pigment quickly.