If you’re a coffee lover, you know there’s nothing better than that first cup in the morning. But did you know your plants might be just as enthusiastic about coffee as you are?
Before you toss those used coffee grounds in the trash, consider this: they’re a rich, natural fertilizer packed with nutrients like nitrogen, potassium and phosphorus. Plus, they’re a sustainable, zero-waste solution to boosting your garden’s health.
Here’s how you can use coffee grounds to give your plants an extra shot of energy.
Tomatoes: Bursting with flavor
Tomato plants thrive in soil rich in nitrogen, which coffee grounds provide in abundance. Mixing a thin layer of used grounds into the soil helps encourage lush, healthy foliage while keeping pests like slugs and snails at bay.
For best results, compost the grounds first or mix them lightly into the topsoil to avoid compacting the earth. You’ll see stronger stems and tastier tomatoes in no time.
Hydrangeas: Picture-perfect blooms
If you’re after stunning blue hydrangeas, coffee grounds are the key. The acidity in the grounds lowers the soil pH, encouraging the hydrangea blooms to turn a brilliant blue. Apply the grounds as mulch or mix them into the soil at the roots.
In just a few weeks, you’ll notice your garden bursting with color, proving that a little coffee can go a long way.
Carrots: Crispy, crunchy nutrients
It turns out the abrasive texture of coffee grounds is good at deterring some of the pests that like to chow down on carrots, keeping them safe for the humans and rodents you might be growing them for. You can even try mixing a package of seeds with a couple handfuls of coffee grounds before spreading them in your garden, throwing in some radish seeds as the crops often thrive together.
Evergreen trees and shrubs: Cool in the shade
Pines, spruces and other sources of year-round greenery often crave a little bit of acidity, and our soils here tend to be alkaline, so your coffee grounds can offer this along with the nitrogen, carbon and other powerhouse ingredients. They can be combined with compost or a fertilizer, spread around the base of the plants and covered with mulch to fertilize the plants, ideally in early spring or late fall.
