By Mariam Khan Hydrangeas are arguably the most popular plants in the UK, but to see them thriving later on in the year experts say there’s one thing you need to do right now. If your green fingers have been itching to get back out into the garden then it’s time and this easy hack can help your hydrangeas double their glorious blossom. It’s time to dust off your gardening gloves and equipment and get your spring garden summer-ready, before BBQ and sun-bathing season. Hydrangeas come in a variety of sizes and colours from pink, blue, white, purple and green. Whilst pruning is usually encouraged…