Hydrangeas turn blue and ‘bloom profusely’ when 1 kitchen scrap is given ‘every other day’ (Image: Getty) Hydrangeas , with the right care and attention, can grow rapidly. Although it's not possible to make them instantly fill an area, providing them with ideal growing conditions can certainly speed up the process. One such method is fertilising these plants , which can boost their growth rate.

While there are fertilisers specifically designed for hydrangeas, there are also free alternatives available. A woman recently shared her success using coffee grounds on her hydrangeas via the Gardening UK Facebook page. function loadOvpScript(){let el=document.

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