The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.
When to keep and when to remove some of the fastest-growing U.S. weeds. While some weeds are a nuisance, some feed people and ...
A bushy, spreading annual to 30cm, with dark green ovate leaves and funnel-shaped deep blue flowers 5cm across, white towards the yellow centre, in summer ...