Hydrangeas are stunning garden shrubs that produce blooms throughout the summer months, flowering in shades of pink, white, or blue. Gardeners can even alter their colour using a straightforward fertiliser technique, such as applying coffee grounds to turn blooms vivid blue while improving soil.
Although gardeners should avoid fertilising or pruning plants during periods of hot weather, regular feeding throughout the growing season can be hugely beneficial. Two further tasks that can keep flowers blooming for extended periods are watering and deadheading, both of which are absolutely vital during summer.
Watering Hydrangeas
According to the Royal Horticultural Society (RHS), hydrangeas thrive in moist, well-drained soil that isn't susceptible to waterlogging. The experts said: "Improving the soil and mulch with organic matter, such as garden compost or a manure-based soil conditioner, will help to keep them moist." To encourage longer-lasting blooms, gardeners can also position them in full sun or partial shade in a sheltered location, protected from cold winds. During summer, they may require watering both morning and evening, though it's advisable to check the soil beforehand to prevent overwatering.
Deadheading Hydrangeas
Deadheading hydrangeas is essential for prolonging their lifespan. The technique involves removing faded or spent flower heads to "encourage more blooms". Eliminating spent flowers also helps maintain the plant's overall health and appearance. To deadhead, begin by identifying any blooms that have faded or turned brown. Simply pinch them off using your thumb and index finger to stimulate the growth of fresh, healthy buds. When it comes to pruning, hydrangeas should be cut back in late winter or early spring, though the precise timing will depend on the variety you're growing.
Feeding Hydrangeas
Hydrangeas respond well to fertilising, particularly when planted in spring, using a balanced granular feed. To influence flower colour through specific soil conditions, specialist acidifying or alkaline feeds — such as coffee grounds — can be applied. It's always advisable to follow the manufacturer's guidelines regarding application rate and frequency in order to achieve the best possible results.
