Watch the magic unfold: How adding 1 kitchen waste product to hydrangeas will guarantee deep blue blooms
Coffee grounds can help turn hydrangea blooms a deeper blue by lowering the soil's pH level, making it more acidic. The acidity allows hydrangeas to absorb aluminum in the soil, which is responsible for the blue coloration. While coffee grounds are a natural and organic method, faster results may be achieved with additives like aluminum sulfate or elemental sulfur.
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Home Outdoors Gardening Watch the magic unfold: How adding 1 kitchen waste product to hydrangeas will guarantee deep blue blooms News By Camilla Sharman published 30 April 2026 Don't throw out your coffee grounds! When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. (Image credit: Shutterstock) Copy link Facebook X Reddit Email Share this article 0 Join the conversation Follow us Add us as a preferred source on Google Newsletter Subscribe to our newsletter If you love coffee and hydrangeas, I’ve got the perfect hack for you.
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