This will create a nice amber-colored liquid that you can use to feed house plants as needed. Coffee grounds make a great liquid feeder. While adding coffee grounds may reduce soil pH, making it more acidic, the effect is temporary. If you have pink hydrangeas, you can add aluminum salts to the soil, along with coffee grounds. Do coffee grounds make hydrangeas blue? Coffee grounds and tea bags can be used as a mulch around hydrangeas.. While adding coffee grounds may reduce soil pH, making it more acidic, the effect is temporary. The effect is pretty blue clusters of flowers. If you're growing hydrangeas, use coffee grounds to affect their color. For a lot of people, coffee is the go-to when they need a bit of a pick-me-up, but it can actually make some plants perk up, too. Copyright of hydrangeaguide.com 2020. – J & k Digital Media Ltd, the owner of this website hydrangeaguide.com, is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking pyracantha.co.uk to Amazon properties including, but not limited to, amazon.co.uk. While adding coffee grounds may reduce soil pH, making it more acidic, the effect is temporary. Coffee grounds add extra acidity to the soil around hydrangeas. These cookies do not store any personal information. They can cause damage to the blooms by sprouting new seedlings or that are All hydrangea blooms respond to increased acidity in the soil, though the soil must still be fertile and drain well. You can change the blossoms of Hydrangeas (Hydrangea spp.) Coffee grounds compact too quickly which doesn’t make them an ideal media for mulch. Lie: Adding coffee grounds to your soil will make hydrangeas turn blue. Your mulch needs to breathe to let water and air in as well as out of the soil. How to change the color of Hydrangeas with used Coffee Grounds: Does this Work? It is faster to just throw the coffee grounds on top of the soil but it’s going to smell a bit unpleasantly and leave your garden looking quite ugly as it starts to mould. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. The effect is pretty blue clusters of flowers. The grounds apparently don't have the acidity that coffee itself (the beverage) has, so I'd be a little more concerned about pouring coffee on my plants than about using grounds. Coffee grounds by themselves make a gooy mess. If your soil is more alkaline, you can lower the pH by applying Soil Acidifier at the rate specified on the package. 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