Times: THE Met Office is to warn gardeners to plan for a warmer climate by cultivating drought-tolerant plants such as palms, olives and Mediterranean herbs and to resign themselves to the death of the traditional lawn. It believes this year will be one of the hottest on record. The Met Office will issue the warning at the Royal Horticultural Society (RHS) Hampton Court Palace flower show this July. “If you are planting long-lived plants like trees then you might want to choose …