We all throw away the coffee grounds, and they end up being dumped in the garbage and shipped to a landfill.
However, you can be much smarter and use coffee grounds in various ways in your household:
In case you’re making your own compost, used coffee grounds will be a great addition to it because coffee grounds contain a lot of nitrogen. This provides a lot of energy for the bacteria in the compost to break down the organic items you’re composting. It also speeds up the composting process. An additional benefit of coffee grounds is that they also cover up the unpleasant smell that comes off as a side effect.
If you want to use coffee grounds for your compost just throw them in your compost bin as you do with anything else.
Coffee beans are loaded with nitrogen, which makes them an excellent fertilizer. Therefore, mix coffee grounds with the soil in order to stimulate the growth of microbes in the ground, and as they break down, the nitrogen will provide nutrients for the plants.
Coffee beans contain acid, but it is water-soluble, so it gets washed away into the coffee, and hence, it is great as a fertilizer.
Used coffee grounds make an excellent alternative for do-it-yourself wood staining. It is incredibly simple to apply and it will give your wood a nice, organic tone.
To make this wood stain, start off by gathering your leftover coffee grounds and pour them into your coffee pot or your french press. Add boiling water to the container and let it sit for at least two hours, however if you have enough time to let it sit overnight do that instead. Once the mixture is finished sitting, filter out the coffee grounds and pour it into a container that is large enough that you can fit a paintbrush in it.
Then, soak a paintbrush in it shortly, and apply it generously to the wood. After the initial layer, wait for 10 minutes, and add another one. After a few times, you will get the desired color. If the needed shade should be darker, you can even rub in coffee grounds to make it darker.
Last, but not least, used coffee grounds make an excellent mosquito repellent and insecticide. This is because mosquitoes are repelled by the strong odor used coffee grounds give off. Also, a number of studies have found that used coffee grounds are highly effective in killing off mosquito larvae, which makes them a great natural insecticide.
The method of application is quite simple – pour fine, used coffee grounds into any small, still bodies of water near your house; this can be small puddles in or around your backyard. In thus way you make unfavorable environment for mosquitoes. Plus, this method will kill any mosquito larvae that grow there.
Alternatively, you can burn coffee grounds in tin cans or aluminum foil and increase its insect-repelling scent. Or, mix hot water with coffee grounds and place this in a spray bottle. Use the liquid to spray on the infected areas.