Let’s Compost
Are you wondering what to do with all those left over used coffee pods? Did you know, they are great for using in compost?
You can add the grounds to your existing compost heap by simply mixing it through ensuring that the grounds are evenly distributed throughout the other materials. Coffee grounds will speed up the rate of composting because of their nitrogen content. Make sure the pods are still fresh when you add them to the compost. Because the pods are damp and full of nutrients they will quickly develop mould, so best to be using them straight away. Nobody wants mouldy compost.
Check the pH level of the compost pile every month to ensure that the acid in the coffee grounds does not substantially raise the acidity of the pile. If the pH is low, add horticultural lime to the pile at a rate of 1 teaspoon per five pounds of coffee grounds added to increase the pH. Most plants prefer a balanced pH, so make sure to monitor the pile carefully.
Mulch it!
If you don’t have a compost heap, and are looking for a low maintenance garden, then you can simply toss your waste coffee grounds onto the soil as mulch. Their dark color absorbs heat from the sun and can help the soil to warm up, they’ll also add nutrients to the soil as they break down
Coffee grounds can also be added directly to acid-loving plants, such as blueberries, rhododendrons and azaleas. Encircle the main stem with coffee grounds, leaving a gap between the stem and the grounds. Rain will deliver the nutrients in the coffee grounds to the roots over time. This provides the plants with a slow-release source of nitrogen and acid, which results in steady growth.
Another advantage of using coffee ground directly on the soil is that it can deter pests. Slugs and snails 
aren’t fond of the caffeine or the gritty texture, and might go elsewhere for lunch. If you have a problem with cats using your garden as a litter box, then coffee mulch can help to disguise the smell and encourage them to ‘go’ elsewhere. And if you’ve got access to a regular supply of coffee grounds, then it’s worth experimenting to see whether the smell confuses carrot flies, and other pests that find their way to your plants by smell.
The bonus of this is, if you love the aroma of coffee then wherever you go in your garden you’ll get that fresh coffee aroma. How good is that!
What about the Worms!
Feed coffee grounds to your worms, they love munching their way through the grounds and it can be fed as part of their diet. Start with small amounts and then feed the worms amounts they can eat in four hours. Worms process the grounds through their bodies and produce their own compost. You’ll need to keep a careful eye on the pH levels to keep your worms happy. Balance out the acidic coffee grounds with some lime, or crushed up eggshells.