Thanks to the UK’s increasingly hot summers, the RHS is considering relocating its Wisley hydrangeas to its northern Gardens. When you’re deciding where to plant hydrangeas, it’s always worth remembering that they’re woodland plants by nature, and they thrive in light shade. It makes sense, then, that the UK’s leading gardening charity is thinking about rehoming its RHS Wisley hydrangea collections in the north. ‘RHS Wisley is a very dry area,’ Guy said. That’s why RHS Wisley is going to keep some hydrangeas on its north-facing slopes, for example – and you might already be growing your plants in similar conditions.