Hydrangeas are just beginning to stir in May, adorned with numerous buds that will open into stunning blooms later in the summer. Many gardeners adore hydrangeas for their minimal fuss, but feeding them now is vital to encourage maximum growth.
Spring brings substantial rainfall, which can drain nutrients from the soil, while warmer weather strips moisture. Hydrangeas are exceptionally thirsty plants; if their soil struggles to hold water, they may wilt, turn brown, or not flower well in summer.
However, Richard Seres-Nagy, a gardener with over 20 years of experience from Hydrangea Library, reveals a natural method using a leftover scrap most people discard daily: coffee grounds.
Why Coffee Grounds Work
Coffee grounds are mildly acidic, which hydrangeas adore, and carbon-rich, introducing organic matter to the soil. This process breaks up compacted ground and attracts earthworms, rebuilding soil structure.
It enhances soil aeration, allowing more oxygen to reach roots, while organic matter absorbs additional water to keep hydrangeas hydrated longer. Coffee grounds also contain nitrogen, a vital nutrient in spring that promotes foliage growth and robust stems capable of supporting larger, heavier blooms.
Feeding hydrangeas with coffee grounds is the most straightforward method to enrich soil before summer and encourage flowering without any expense.
How to Feed Hydrangeas Coffee Grounds
Exercise caution when using organic feed, as it is more concentrated than shop-bought fertilisers. Dilution is advisable.
Place approximately a tablespoon of coffee grounds into a spray bottle or watering can, then water the hydrangeas with the diluted mixture. Repeat once a month until summer. Your hydrangeas should reward you with an abundance of stunning blooms without constant watering.
Alternatively, scatter a thin layer of coffee grounds around the base of your hydrangeas before watering. Begin with a modest amount and always use leftover coffee grounds from a brew, as fresh beans are too potent and risk overfertilising.
