Coffee grounds make great soil conditioner and compost additive which is why many gardeners use it in their garden. Coffee grounds have been used for hundreds of years. They are a good source of nitrogen and they have the same amount of nitrogen as grass clippings.
Some say that the grounds are too acidic to be composted or used directly in the garden. But pH tests done on coffee grounds have shown results from mildly acid to mildly alkaline. Also, the pH level of coffee grounds become neutral as it decomposes.
Here are some ways on how to use coffee grounds on your garden:
Used to deter pests
Coffee grounds can be used as pest deterrent, especially for slugs. Scattering coffee grounds around your plants can help deter slugs, because the grounds scratch their underbellies in an unpleasant way. If you have plants that can attract slugs like Napa Cabbage, you may try scattering coffee grounds around it.
Coffee grounds can also be a good help in vermicomposting. In your worm bin, mix coffee grounds with kitchen scraps, banana peel, shredded paper, and cardboard. The worms will love the coffee grounds.
Stop fungal diseases from spreading
Coffee grounds can suppress fungal diseases caused by fungi like Fusarium and Pythium species. Decomposing coffee grounds have their own fungal colonies; these colonies repel other fungal colonies that can destroy your plants. Adding coffee grounds into your compost helps prevent the growth of verticulum and fusarium wilt inoculates. Tomatoes, eggplants, and peppers are at risk to different wilts.
Coffee grounds as side dressings
You can use coffee grounds as side dressings for heavy feeder plants. Coffee grounds are a good source of nitrogen. They have a 20 to 1 ratio of nitrogen to carbon. Pure coffee grounds are a good side-dressing for tomatoes, squash, leafy vegetables, and hungry fruiting vegetables. You can put a handful of coffee grounds into the transplant hole, for these plants. In that way you can avoid fungal diseases from spreading.
Use to make a liquid feeder
Mix a handful of coffee grounds and water into a bucket, leave it for one or two days to create a nice amber-colored liquid. You can feed this to your plants if needed.
Add coffee grounds to your compost
Coffee grounds are excellent additions to your compost pile because they heat up quickly and help turn your organic material into beautiful, dark, rich soil faster. In every 5 kilograms of coffee grounds add two teaspoons of lime.
Lay a thin layer of coffee grounds directly as mulch for your plants. Be careful not to make the coffee sheet mulch too thick as your plants may suffer due to the caffeine residues in the uncomposted coffee grounds. Any problem will heal within a couple of months though so there will be no lasting damage. To avoid problems though, just lay about ½ inch layer of coffee grounds atop your regular organic mulch.
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