RHS ban of high-risk Xylella host plants could be “imminent”

The RHS is to let garden designers and nurseries know whether they can use high-risk Xylella host plants in the next few weeks, with olives, lavender, rosemary and other plants in the firing line. The RHS said it would not publish its policy until it sends out garden allocation letters for RHS Chelsea Flower Show 2018 on 12 October.