Exclusive: British garden staple becomes most frequently reported plant for hot weather problems, charity reports With their lush foliage and blooms which turn pink, purple or blue depending on the soil, hydrangeas are a firm favourite in Britain. The shrubs bloom throughout summer and have historically thrived in the mild, damp British climate. But hotter summers and heatwaves such as the one hitting parts of England this week are putting the flower at risk in the south of the country, the R...