Ground coffee is usually used to make a mean cup of Joe. In addition, it is used in DIY home remedies for repelling insects and removing bad odors.
But did you know that most home gardeners use coffee grounds as fertilizer for their plants, grass, and soil? They serve as great eco-friendly plant food and contain all the nutrients your grass needs to grow.
These include phosphorous, potassium, and a considerable amount of nitrogen. However, coffee grounds are best for grass after being used in the kitchen.
So, on that note, let’s discuss the pros and cons of using coffee grounds as fertilizer and whether they will kill your grass or benefit it!
Does Ground Coffee Kill Grass
Ground coffee is an efficient and safe weed killer. But it shouldn’t be kept on your grass for an extended period of time.
Avoid watering your grass for a couple of days after applying it. Doing so will enable the grounds to be absorbed by the soil and start performing their magic.
But, if you’ve watered your lawn after applying the ground coffee, allow it to dry for 24 to 48 hours before watering it again as usual.
By employing this technique, you will effectively apply grounds to kill weeds while causing the least amount of harm to the grass.
Benefits of Using Ground Coffee on Your Grass
Listed below are a few benefits of adding ground coffee to your grass:
It Improves Drainage
Ground coffee is an excellent organic fertilizer for your grass. Therefore, adding a couple of cups to your soil from time to time will improve its overall quality.
This way, you will introduce more organic material inside your soil, improving its overall drainage capabilities. Improved drainage means water will not pool around your grass, preventing rotting.
Ultimately, every seasoned gardener knows that improving their soil’s drainage capabilities is essential for all plants, let alone grass.
So, adding ground coffee to your garden soil would be better than chucking it into the bin. But, one thing to remember here is to mix the soil and grounds well.
After all, ground coffee typically contains minuscule particles that can clump up if not mixed properly with the soil.
This can lead to the exact opposite, as these clumps will decrease your soil’s water drainage capabilities even more. So, keep this in mind the next time you randomly dump ground coffee on grass.
It Reduces Chemical Fertilizer Use
Coffee grounds typically end up in the trash can and subsequently at your local landfill. Reusing or recycling used-up coffee grounds is an excellent way to help the environment.
What’s more, if you decide to use coffee grounds on your grass, you will limit the use of chemical-based fertilizers. Doing so will allow you to play your part in contributing to a more natural and organic garden.
It Works as a Naturally Slow Fertilizer
You can add ground coffee to your soil to introduce slow-releasing nutrients into your grass. In fact, good amounts of nitrogen, phosphorus, potassium, and a few other nutrients can be found in used coffee grounds.
So, adding these nutrients to your soil is beneficial because they are vital for your grass’s health.
They are perfect as a slow-acting fertilizer as they won’t be immediately available to the grass’s roots. Instead, they will be released slowly throughout the coffee grounds’ breakdown cycle.
It Can Be Used as Mulch for Your Grass
You can use ground coffee as mulch for your grass by combining it with other organic materials like dried-up twigs, leaves, and flowers.
In fact, by layering this mixture on top of your grass, you will prevent moisture from escaping. Such a mixture will help keep the soil beneath the grass cool during the summers and warm during the winters.
Moreover, adding mulch to your grass can also help you control weed growth. This is because adding mulch on top of your grass typically creates a physical barrier.
This will stop light from falling onto weed seeds, preventing them from germinating.
Ensures a Healthy Worm Population
Using coffee grounds on your grass will boost the number of worms in the soil beneath it. After all, gardening experts believe that worms enjoy coffee grounds as food.
Your garden needs a healthy worm population to improve grass root health and promote compost decomposition.
Therefore, adding used-up ground coffee to your grass and combining it with your compost keeps the worms inside your soil working overtime.
It Keeps Away Cats
If you have an issue with cats pooping and peeing on your grass, trust us, you’re not alone.
Felines usually use your front and backyard as their litter boxes, defecating and urinating on gravel, grass, and soil. However, this can be a serious problem, especially if you care about your garden.
In fact, it can be annoying to clean pee and poop from a garden you’ve worked so hard to nurture. But not to worry. You can tackle your cat issues by pouring ground coffee onto your grass and other plants.
The coffee smell has been known to keep cats away, especially if combined with other preventative measures. But remember not to pile heaps of coffee on the grass.
As mentioned earlier, this can lead to clumps forming on top of your soil, reducing water drainage capabilities.
It Acts as a Slug and Snail Repellent
It’s a common belief that used coffee grounds keep slugs and snails away. These critters chomp on foliage, which can end up looking ugly, and can even contribute to the decline and degeneration of grass and plants.
Such problems make these unpleasant bugs a typical concern for gardeners.
Coffee grounds are believed to repel these pests due to their flavor and aroma. Moreover, coffee grounds’ gritty texture can also serve as a physical barrier that snails and slugs can’t cross.
It Eliminates Fungus
When fungi destroy your beautiful garden, this leads to dirty patches on your grass. Such a thing can make it untidy and an eye sore.
These fungi-causing microorganisms vanish after sprinkling and raking ground coffee into your lawn. This is an easy way to use leftover ground coffee from your kitchen.
Downsides of Using Ground Coffee on Grass
Listed below are a few disadvantages of using ground coffee on your grass.
It forms A Dense Barrier
Ground coffee is made up of fine coffee particles that can clump up and form a rock-like formation. As stated before, this will create a barrier between your soil and grass.
In fact, if you’re adding unused ground coffee as a top dressing for your grass, you will create clay soil. This is obviously disastrous for your grass’s health.
This barrier will lead to your grass losing its water supply, eventually dying out.
It is non-Acidic
Because coffee is acidic, many people advise putting coffee grinds on the grass to lower the pH level of the alkaline soil beneath it and make it more neutral.
In fact, some individuals also advise applying it to the soil near plants that thrive in acidic environments, like azaleas, hydrangeas, and blueberries.
However, used ground coffee is less acidic compared to fresh ground coffee. Most leftover coffee grounds will have a neutral pH, making them ineffective for lowering soil pH.
That said, freshly ground coffee is also ineffective in lowering the soil’s pH. This is because the acid inside these grounds is washed away when it rains.
Ultimately, using fresh and used-up ground coffee to lower or control your soil’s pH is a bad decision.
It Can Destroy Your Soil’s Good Bacteria
Ground coffee is antibacterial in nature. Although this might sound good, the same is not the case for your grass and soil.
Your soil contains a ton of good bacteria that keep grass-eating insects and bacteria away.
Adding antibacterial coffee grounds to your grass kills off such bacteria, leaving your grass vulnerable to insects and other critters.
However, that doesn’t mean you should never add coffee grounds on grass. All you have to do is add a controlled amount, and you will be good to go.
It Can Slow Down Root Growth
Applying too much ground coffee to your grass can lead to restricted root growth due to caffeine overdose. This is especially the case for mature grass.
While ground coffee does more damage to seeds, applying only the necessary amount is still a no-brainer. Doing so will help you avoid risking your grass’s overall health.
How to Remove Excess Ground Coffee from Your Grass
There are a few quick solutions to clean up and lessen the impact coffee grounds have on your grass, whether you accidentally dropped your coffee mug or tipped your compost bin.
The best thing to do here is to vacuum or sweep the spilled coffee grounds quickly. After all, the caffeine inside ground coffee can eventually kill your grass if left on it for a long time.
So, if you quickly remove the coffee, it is highly unlikely that this caffeine will seep into your grass.
For liquid coffee or damp coffee ground, it would be wise to rinse the grass with water. Doing so will allow you to dilute the caffeine since this substance is water-soluble.
Ultimately, used and fresh coffee grounds cannot kill your grass if you use them in moderate amounts.
But, if you keep lathering it with ground coffee daily, your grass will start to have a yellow or “burnt” look. So, ensure that you’re following the right application techniques.
At the end of the day, ground coffee is an excellent natural fertilizer for your grass.
So, if you take the necessary care and time, you can use it to your advantage and make your garden appear green and lush in no time!
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