Coffee grounds are usually touted as a cure-all when it comes to controlling garden pests like aphids, snails, and slugs, but truth is… there's no truth to their pest-repelling power. Same goes for banana peels, which will not deter garden lice from your plants.
Control with natural or organic sprays like a soap-and-water mixture, neem oil, or essential oils. Employ natural predators like ladybugs, green lacewings, and birds. Grow the right plants that attract predatory insects, plants that repel aphids, and plants that "trap" aphids.
Not only do they repel mosquitoes, but also other insects such as wasps and bees. Coffee grounds are the bee's knees when it comes to staying bug bite free. Most bugs have a very strong sense of smell. Coffee grounds are very potent and even more potent once they are burned.
Coffee grounds are rich in nutrients, especially nitrogen. They also have some amount of other nutrients like potassium and phosphorous. Overall, this means that adding coffee grounds to your garden can work fairly well as a fertiliser. Coffee should be spread in a thin layer, rather than being clumped in one place.
If insecticides are needed, insecticidal soaps and oils are the best choices for most situations. Oils may include petroleum-based horticultural oils or plant-derived oils such as neem or canola oil. These products kill primarily by smothering the aphid, so thorough coverage of infested foliage is required.
Vinegar contains acetic acid that acts as a natural pesticide and burns aphids. Mix white vinegar with water in 1:3 proportion. Fill this solution in a mister bottle and use it on the parts of the plants affected by aphids; before doing that, if you like, do a patch test first!
How Often Should You Add Coffee Grounds to Plants? You can fertilize houseplants an average of 7 to 10 days in a row, but no more, as there is a risk of over-acidification of the soil. A cup of ground coffee should be added to the compost once a week.
Since coffee grounds have such a pungent and intense smell, mosquitoes do not like to come near it. Mosquitoes are repulsed by all types of coffee, whether it is fresh, used, or burnt. The most effective way to use coffee grounds for mosquito control is by burning them, as it creates a stronger aroma.
Kopi luwak, also known as civet coffee, is a coffee that consists of partially digested coffee cherries, which have been eaten and defecated by the Asian palm civet (Paradoxurus hermaphroditus).
Coffee beans, grounds and brewed coffee contain caffeine, a very dangerous and toxic chemical to cats and dogs. Ingestion can be life threatening. According to the Pet Poison Helpline, a moderate amount of coffee can easily cause death in small dogs or cats.
Keep Bugs at Bay
Use spent grounds to keep ants out of the house by laying down a 2 inch wide line around the foundation and entrances. It also works for many kinds of worms, snails, slugs and other insects. Put the same kind of line around plants, or mix grounds with hot water, and pour over anthills.
Speaking of new growth, aphids are drawn to tasty, tender young shoots, so one of the keys to keeping their numbers in check is to avoid over-fertilizing your plants. Excess nitrogen causes a flush of new growth that helps sustain new generations of aphids.
Banana peels are also helpful for deterring aphids on plants. Aphids hate the smell of banana apparently. While adding peels around plants should help deter aphids, spraying a plant with the tea should help protect it more.
Ladybeetles are probably the most well-known of beetles that eat aphids. There are many species, and both the adults and larvae eat aphids. Convergent lady beetles (Fig 2) and the seven-spotted ladybeetles (Fig 3) are abundant species in the environment.
Squirrels aren't the only wildlife that are likely to be repelled by coffee grounds. You can also count on coffee grounds to keep deer, chipmunks, and snails or slugs at bay.
These things are great for nutrient poor lawns and lawns on clay or sandy soil. However, coffee grounds still contain some residual caffeine, which can cause harm to the micro fauna in your soil, and that's why it is not recommended to apply coffee waste directly to your lawn.
Coffee grounds add organic material to the soil, helping water retention, aeration, and drainage. 'Leftover diluted coffee can create a liquid plant fertilizer, too. Simply mix two cups of brewed coffee grounds with five gallons of water in a bucket overnight. '
It's okay to water plants with leftover coffee or to add coffee grounds to the compost pile but learning when and why to use coffee in the garden will protect your plants. Only use black, unflavored coffee with this method to offer plants a source of nitrogen which can fertilize certain indoor and outdoor plants.
You know that last bit of coffee that always seems to be left in the carafe? Don't just pour it down the drain — you can use it to fertilize your plants, both indoor and outdoor. Coffee grounds (and brewed coffee) are a source of nitrogen for plants, producing healthy green growth and strong stems.
Caffeine also is known to have a negative effect on plant growth." You'll know if you're giving your plants too much coffee if you notice the leaves turning yellow or brown, which is a sign that the soil has become too acidic. At that point, simply dilute your coffee before using it to water your plants.
Hydrogen peroxide aerates the soil. Hydrogen peroxide works as an anti-fungal. It helps control aphids, mites, mealybugs, and fungus gnat larvae. Hydrogen peroxide attacks the black, sooty mold caused by aphids.
Soils with excessively high nitrogen create very fast growing plants. This leads to rapid cell wall growth, which are elongated, thinner and much easier for the piercing mouth-parts of an aphid to penetrate than normal. The plant sap will also be high in nitrogen and will be especially attractive for the aphid.
Plants that Naturally Repel Aphids
Planting garlic, chives, leeks, catnip, fennel, dill and cilantro will help repel aphids. Marigolds are also known to drive away a number of unwanted pests. Research good companion plants for these garden additions and place them wisely.