Roses and hydrangeas will produce healthier flowers if fed coffee grounds (Image: Getty)
Elegant blooms may not seem like they have much in common with giant but both thrive when fed coffee grounds at the right time. Coffee grounds make the soil mildly acidic, which both hydrangeas and roses will enjoy. This adds more nutrients to the soil that the plants need to grow healthier flowers when their growing season begins.
The experts at have explained that any leftover coffee grounds can easily be turned into a “great natural ” that helps roses and hydrangeas and keeps from eating your plants. They said: “Coffee grounds improve soil structure, enhance drainage, and add organic matter. They are slightly acidic, making them ideal for acid-loving plants. They can also help deter pests like slugs and snails.”
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Coffee grounds make soil slightly acidic, provides more nutrients and can also help keep away slugs (Image: Getty)
Slugs can be common in spring when gardens are growing again, and there is lots of foliage for them to eat, but you can naturally deter them with coffee.
Caffeine is incredibly uncomfortable for slugs to crawl on, as it dehydrates them and makes it harder for them to move. Therefore, they are unlikely to eat flowers if coffee grounds are on top of the soil.
Coffee grounds contain nutrients such as nitrogen, phosphorus, and potassium, which flowers need to grow strong. These nutrients can also help change the colour of hydrangeas, resulting in more vivid blooms.
The expert added: “Roses appreciate the nitrogen boost from coffee grounds, promoting lush foliage and healthy blooms. Mix grounds into compost or sprinkle lightly around the base.
“The acidity in coffee grounds can influence hydrangea bloom colors, turning them blue in acidic soil. Use sparingly to maintain balance.”
Feed roses and hydrangeas coffee grounds in late March once the weather is warmer (Image: Getty)
How to use coffee grounds to fertilise hydrangeas and roses
All you need to do is apply a thin layer of coffee grounds around the base of your flowers, but it is best blended with compost to help add more organic matter to the soil.
Simply mix coffee grounds with other leftovers, such as banana peels or eggshells, to give flowers a larger and more balanced nutrient supply.
Feed your roses and hydrangeas roughly 100g of coffee grounds once per month and water them afterwards to help the nutrients seep into the soil.
Coffee grounds can help your flowers, but you only need a small amount since they are an acidic substance, and too much added to the soil could burn the roots if you are not careful.
The best time to add coffee grounds to hydrangeas and roses is when they are actively growing, in mid-spring to early summer, when the weather is warmer.
This means it is usually best to wait until late March to feed flowers, as this ensures the soil is warm enough for them to grow again.
If you feed your flowers lightly and wait until the temperature has risen, coffee grounds can help boost roses and hydrangeas, resulting in bigger flowers in your garden this year.