Plant buyer David Mitchell said: "We love our lawns in the UK and heat waves can threaten lawn health if you don't know what to do. Feeding lawns during excessive temperatures is complete no-no, plants perspire 85 per cent more than humans and raised temperatures reduce the soil's ability to absorb fertiliser, so feeding with granular products can cause lawn burns.
"We are giving our customers a six point plan to follow this weekend, including morning watering, leaving grass cuts on the lawn to protect it and even adding a layer of bark, on borders not lawns) to provide blanket protection. And of course, prepare for the storms – investing in a water butt which is only £39.99 means that gardeners can capture the drops and have a ready supply if a water ban comes later in the summer."
WGC recommends irrigation using an system such as the Hozelock Automatic Watering Kit, mowing at a higher setting, mulching, using a water butt, using Maxicrop Natural Fertiliser and planting Sedum, Lavender and Cistus.
Waterwise chief executive Jacob Tompkins said: "A heatwave can put gardeners in a moral dilemma when it comes to watering a garden responsibly. Gardens can still be watered with a tailored approach to ensure no drop is wasted. With planning, the purchase of a water butt can help ensure supply doesn't run out with a timed irrigation system ensuring watering times and levels are controlled at the optimum point in the day when the sun's heat is coolest. At the end of the day, nothing beats a good old fashioned watering can to provide a low cost yet effective alternative".