As hydrangeas begin to bloom in May, gardeners are encouraged to enhance their growth by adding coffee grounds to the soil. Richard Seres-Nagy, a gardener with over 20 years of experience, highlights the benefits of this kitchen scrap, which is rich in nitrogen and mildly acidic, ideal for hydrangeas. Coffee grounds improve soil texture, retain moisture, and promote healthy root growth, making the plants less susceptible to wilting during hot summer months. For best results, gardeners should dilute approximately a tablespoon of coffee grounds in water and apply it monthly. Alternatively, they can scatter the grounds around the base of the plants before watering. This method is not only eco-friendly but also cost-effective, allowing for stunning blooms without constant maintenance.