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Hydrangeas will grow bigger flowers with 1 kitchen scrap – and can even turn blooms blue


Hydrangeas are popular in summer gardens due to their big beautiful blooms, but it can be disappointing if they do not flower as big as they should. 

One of the biggest reasons hydrangeas may struggle to grow is a lack of nutrients, but rather than spend lots of money on store-bought feed you can give flowers a boost with coffee grounds. 

According to a gardener and the founder of Hydrangea Love, the acidic nature and nutrients found in coffee grounds will help boost hydrangea blooms and keep them healthy. 

She said: “Using coffee grounds for hydrangea plants offers several benefits that can enhance their growth and vibrancy.

“Coffee grounds are rich in essential nutrients such as nitrogen, which is crucial for healthy foliage. Additionally, they help improve soil structure and drainage, promoting root health

“The slightly acidic nature of coffee grounds can also influence the soil pH, which is particularly beneficial for hydrangeas as it can help in achieving their characteristic blue blooms.” 

The nitrogen in coffee can help improve photosynthesis in hydrangeas which will help the flower grow faster and lead to bigger blooms. 

Coffee grounds are also a natural pest deterrent as they are a very popular way to keep slugs out of gardens as they cannot stand the sharp smell of coffee. 

How to boost hydrangea flowers with coffee grounds

All you need to do is collect the leftover coffee from every time you make a cup of coffee, but you can also ask local coffee shops if they are willing to give you any of their used-up coffee grounds as well. 

Store the coffee grounds in a container and once you are ready to use them on your hydrangea you will need to make sure they are completely dried out. 

Spread the coffee grounds on a baking tray and let them air dry for a day or two before using them in your garden. The gardener said: “This prevents mould growth and makes them easier to handle.”

Once the coffee grounds have dried out spread them evenly in a thin layer around the soil of a hydrangea plant. 

Make sure not to apply too much coffee as hydrangeas only need around one cup per plant to help them grow, and they only need to be fed once a month throughout the summer to see the benefits. 

You can also mix coffee grounds into a compost pile or turn them into a liquid fertiliser to help hydrangea flowers. 

The gardener said: “Soak about a cup of used coffee grounds in five gallons of water for a week, stirring occasionally. Use this nutrient-rich solution to water your hydrangeas.” 

Feeding your hydrangeas coffee grounds in the summer is a cheap and ecofriendly way to get hydrangeas to grow even bigger flowers. 

However, make sure not to apply too much coffee as hydrangeas only need around one cup per plant to help them grow, and they only need to be fed once a month throughout the summer to see the benefits. 

The gardener said: “After incorporating coffee grounds, keep an eye on your hydrangeas for any signs of distress, such as yellowing leaves or stunted growth.

“These symptoms could indicate an imbalance in soil nutrients. If necessary, adjust the amount or frequency of coffee ground application.”

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