Your gardenias will bloom pearl-like, vibrant flowers thanks to the nutrient boost and soil improvement that will come from the coffee grounds.
2 – Fuchsias

Fuchsias thrive in slightly acidic soil and will benefit greatly from coffee grounds. The additional nitrogen will encourage robust growth and flowering, bringing your garden to life like never before.
In a way, the grounds will increase the soil’s organic matter content meaning it will be nutrient-dense and able to support vigorous growth.
1 – Hostas

Although hostas don’t necessarily require acidic soil, it still won’t hurt to provide them with some. Coffee grounds can be beneficial for them because they improve soil texture and provide hostas with a good kick of nutrients which would directly translate to better foliage and lush blooms.
How Coffee Grounds Benefit Plants

Coffee grounds benefit plants because they contain essential nutrients like nitrogen, phosphorus, and potassium.
A combination of these nutrients helps plants develop strong root systems, lush foliage, fruit, and vibrant blooms.
Additionally, coffee grounds lower soil pH which creates an optimal growing environment for plants that thrive in slightly acidic soil.