Established in 1759, the Royal Botanic Gardens (RBG) at Kew had 16,900 unique plant species as of May 2019. This makes it the most diverse collection of living flora at a single-site botanic ...

This was enough to see Kew Gardens ranked fourth in this year's rundown, a rise of seven places on its 2019 ranking. RHS Garden Wisley's ascent was even greater, jumping from 28th place in 2019 to ...