What outdoor plants do well with coffee grounds?
The plants that like coffee grounds include roses, blueberries, azaleas, carrots, radishes, rhododendrons, hydrangeas, cabbage, lilies, and hollies. These are all acid-loving plants that grow best in acidic soil. You’ll want to avoid using coffee grounds on plants like tomatoes, and alfalfa. It would be sensible to avoid spreading coffee grounds around seeds or seedlings as they may inhibit germination and growth. There is a more obvious reason why using coffee grounds alone for mulching could be detrimental. Like clay soil, coffee grounds consist of very fine particles that are prone to locking together.Add to Mulch Coffee is an excellent additive to compost, shredded bark or leaf mold. You can also use coffee grounds as a base layer for wood chips and chunks of bark. But make sure to keep the coffee layer thin — no more than a half-inch.Coffee grounds can slightly lower the pH of your soil, making it more acidic. This is perfect for plants like azaleas, potatoes, and peppers.Add to soil: Composted coffee grounds can be added directly to soil or potting mix to fertilize plants. Make sure to mix them in well. Use as a liquid fertilizer: A dilution of coffee grounds in water can be applied as a liquid fertilizer.
Is ground coffee good for outdoor plants?
Adding coffee grounds directly to the soil as a fertiliser can be a good option. 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. Plants that are “nutrient-hungry” and prefer slightly acidic soil do well with used coffee grounds added to the topsoil. For instance, Snake Plants, Philodendrons, the Peace Lily, Pothos, Palms, the Jade Plant, and the Money Tree are coffee-loving plants.The use of coffee grounds does not attract pests. In fact, it’s a great repellent of all types of pests, from pesky insects to rodents. Just the smell of coffee grounds is all it takes to deter insects like adult mosquitoes, bees, fungus gnats, wasps, ants, slugs, cockroaches, and more.However, there are some plants that you should avoid using coffee grounds on. Plants that prefer alkaline soil, like lavender and lilacs, can be harmed by the acidity of coffee grounds. Plants that are sensitive to caffeine, such as geraniums and some herbs, can also be affected by the presence of coffee grounds.Do not sprinkle more than a thin layer around your plants, or the coffee grounds can become impenetrable, preventing water from getting into the soil. If you evenly sprinkle coffee grounds around the plants once a week or so, the amount will likely be okay.When slugs ingest coffee grounds, they suffer from severe dehydration and eventually die. For these reasons, slugs will avoid areas where coffee grounds have been sprinkled. While coffee grounds may not be the most effective way to keep slugs out of your garden, they can be a helpful tool in deterring these pests.
Which trees do not like coffee grounds?
Not ALL plants love coffee grounds. While coffee grounds work wonders for some plants, others—like lavender, rosemary, and succulents—can suffer from the acidity and moisture retention. Repel insects and pests: Coffee grounds contain compounds that are toxic to many insects. Why It Works: Coffee grounds are known for their strong scent, which can repel pests such as ants, mosquitoes, and even cats.Salts: Coffee grounds can contain salts, which can build up in the soil over time and become toxic to plants. Mold: Wet coffee grounds can attract mold, which can be harmful to plants. Caffeine: While caffeine is not toxic to plants in small quantities, it can be harmful if used in large amounts.Sprinkling coffee grounds among your plants may help to ward off rabbits and other small mammals due to coffee’s powerful scent. Plus, it composts naturally over time, giving your plants some extra nutrients!Which plants benefit from used coffee grounds? Coffee tends to be slightly acidic and is therefore good for acid-loving plants such as hydrangeas, as well as nutrient-hungry plants like roses, but again, use it only in moderation on any one plant.As our question: “Do coffee grounds attract pests? The opposite is true. According to the Environmental Protection Agency (EPA), coffee grounds are an efficient way to keep pests out of your garden.
Are coffee grounds good for evergreen plants?
Apply the mixture of coffee grounds and compost around your evergreen plants using a hand trowel. The coffee grounds encourage microbes in the soil, which in turn break down the grinds, causing them to release nitrogen into the soil, which feeds the plants. Acidic-loving plants such as azaleas, blueberries, hydrangeas, rhododendrons, and roses will benefit from a sprinkling of coffee grounds around the base of plants. Vegetable crops that may benefit from coffee grounds include carrots, cucumbers, peppers, potatoes, and radishes.By mixing coffee grounds with lime and organic matter in a compost pile, you get a shot of nutrients while cutting coffee’s natural acidity. This mixture is especially good for acid-loving plants such as azaleas, rhododendrons, and blueberries.Coffee-Loving Plants and Vegetables Generally, plants that prefer acidic soil respond well to a weekly watering with coffee or a sprinkling of coffee grounds.The plants that like coffee grounds include roses, blueberries, azaleas, carrots, radishes, rhododendrons, hydrangeas, cabbage, lilies, and hollies. You’ll want to avoid using coffee grounds on plants like tomatoes, clovers, and alfalfa.
Which plants do not like coffee?
It is important to check what plants like coffee grounds before using them in your garden. Some examples of plants that may not tolerate coffee grounds include christmas cactus, fruiting plants, and flowering shrubs. Overuse of Coffee Grounds Too much of a good thing can be harmful. Excessive coffee in garden soil can lead to compacted earth, restricting water and air flow. Moderation is key—blend coffee grounds with other compost materials.Lavender, rosemary, thyme and other Mediterranean herbs prefer well-drained, slightly alkaline soil and dislike the acidity coffee grounds bring. Similarly, tomatoes may suffer if the grounds are added directly, especially in large quantities, as it can disrupt pH and introduce too much nitrogen.Best Practice: Add coffee grounds to compost rather than directly to soil. Safe Application: Use no more than 20% coffee grounds in compost mixtures. Perfect for: Roses, hydrangeas, azaleas, and blueberries when properly composted. Pest Control: Create a 1–2% coffee solution to kill slugs effectively.Key Points. Adding coffee to your plants can improve soil health by providing essential nutrients and boosting microbial activity. While coffee can deter slugs and improve nutrient content, it shouldn’t replace regular fertilizer as it lacks some key nutrients.Snake Plant (Sansevieria) This low-maintenance beauty can benefit from coffee grounds, but only in small doses. Blend them well into the soil to prevent clumps and avoid over-acidifying.
What plants should I avoid putting coffee grounds in?
In most cases, the grounds are too acidic to be used directly on soil, even for acid-loving plants like blueberries, azaleas and hollies. Coffee grounds inhibit the growth of some plants, including geranium, asparagus fern, Chinese mustard and Italian ryegrass. According to the EPA, coffee grounds are a safe and effective way to keep pests away. Coffee grounds can help repel not only mosquitos but also other annoying insects like wasps and bees.Coffee grounds are great for pest control. Ants especially don’t like them – both grounds and the acids damage their exoskeletons. Use spent grounds to keep ants out of the house by laying down a 2 inch wide line around the foundation and entrances.While many budding gardeners may be concerned that coffee grounds can attract pests, the reality is quite to the contrary. In fact, when implemented correctly, coffee grounds can be an effective way to repel certain pests such as wasps, snails, and mosquitoes.