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.

At the end of the second year the average plant width and height were 30” (76.4cm) and 19.5” (49.4cm), respectively. Bouteloua gracilis ‘Blonde Ambition’ on 40% ETo in Sept. 2016. Photo: ...