Coffee grounds are one of many natural houseplant fertilizers, but you should take care to use them properly, to get the best results. Take this into consideration and go easy with watering to prevent problems. Another good option is to use your coffee grounds in a homemade potting soil mixture. They apparently act like very fine perlite – loosening the soil and retaining water. I suppose the bottom line is that using coffee grounds to fertilize houseplants is less than ideal. You can use it in the following ways: After you have brewed the coffee in a pot, use the leftover to water the plants. They’ll be able to take advantage of the leftover nitrogen in the coffee grounds. Coffee grounds are highly acidic, they note, so they should be reserved for acid-loving plants like azaleas and blueberries. The nitrogen in coffee grounds also raises the temperature of the soil, which can kill weeds and curb pests. Enjoy your stay at Smart Garden Guide. Ideally, using coffee grounds compost, or adding coffee grounds when repotting will reduce this risk. However, there are three great options for how your indoor plants can benefit from coffee grounds as a fertilizer. Sprinkle used coffee grounds around plants as a slow-release fertiliser Using Coffee Grounds as Fertilizer. The bottom line is coffee for houseplants might not be the ideal option, but if you use it efficiently, it can be beneficial for your plants. Once again, this highlights why adding coffee grounds to the surface of the soil is not recommended. Coffee grounds are one of many natural houseplant fertilizers. These dry, fresh grounds usually contain more caffeine than your used coffee grounds, which can damage most flowering plants. Just keep it in bright light and the plant will thrive. smartgardenguide.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com and other Amazon stores worldwide. The magic of the coffee grounds provides benefits to your plants. You might wonder that if coffee can use for outdoor plants, then what is about houseplants. Coffee grounds can be converted into solid and liquid fertilizers. Coffee grounds provide an ideal breeding ground for fungal organisms, and this can lead to fungal disease in your plants. Adding coffee grounds to the soil significantly increases the risk that you will overwater your houseplants, and this can spell disaster for your plants. Both brewed coffee and tea are slightly acidic and over time may change the soil chemistry in your pots too much. This attractive houseplant flowers from December till April. Adding coffee grounds to your compost bin is also recommended. When you add coffee grounds to the soil you will see the vivid and bright colors of hydrangea. Peace lilies in particular do best with a mix of nitrogen, phosphorous, and potassium. Do This Instead! Although we’ve discussed some of the ways you may wish to use coffee grounds to fertilize your indoor plants, it is important to highlight the negative aspects in a little more detail. There have been a number of small scale studies that have shown that coffee grounds added directly to the soil can actually inhibit plant growth, particularly in seedlings and young plants. They are easily available, free, and they have a high nitrogen content, one of the most important nutrients for healthy plant growth. We are advised to put them in the garden for perky plants and bright blue azaleas. Coffee grounds are a good source of nitrogen, encourage the growth of the beneficial microorganisms in the soil, and help plants that prefer acidic growing medium. Pour the mixture close to the base of the plants you want to fertilize. Put coffee grounds in your compost for healthy soil and earthworms! Apart from that, you can always side-dress your plants with used coffee grounds. Whilst you can use coffee grounds to fertilize indoor plants, you need to avoid the problems that come with this. It is a huge fan of nitrogen and acid so you can use a solution of coffee and water for best growth. Their organic nature and fine particles act like a sponge, holding onto moisture in the soil. If added in fairly large amounts, they can raise the acidity level of the soil for acid-lovers such as blueberries, azaleas, and rhododendrons. Coffee grounds are an efficient source of nutrition for plants, but they must be used in moderation. Wait to water until your plants' soil is dry to the touch, and use your diluted leftovers only about once a week. Most effective than just throwing the grounds on … Other options include using a porous pot, and/or a smaller pot. People have been using coffee grounds in their gardens for years with reasonable success so it’s only natural for people to experiment with using coffee grounds to fertilize indoor plants. Add all your used coffee grounds to your compost pile and wait until your compost is ready to be used. 2. Coffee grounds contain a large amount of nitrogen compared to phosphorus and potassium. Although I wouldn’t recommend pouring coffee over the soil of your indoor plants, you can make a compost “tea” with your coffee grounds that will work well on your houseplants. If you do use coffee grounds on your indoor plants, either directly or as part of a compost, you can reduce the risk of overwatering by altering the composition of the soil that you use. 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