article 575

Posted by

If you have leftover coffee, don’t throw it away! Instead, dilute it with water and use it to fertilize your plants. Coffee grounds and brewed coffee are great sources of nitrogen, calcium, and magnesium for plants, promoting healthy growth and strong stems. Dilute your coffee so that it looks like weak tea, using about 1/4 coffee and 3/4 water or a half-and-half mix, depending on the strength of your brew. You can use coffee fertilizer on potted plants, houseplants, and in your vegetable garden, though some plants, like lily of the valley and lavender, prefer alkaline soil. Acid-loving plants, such as blueberries and azaleas, thrive on coffee grounds, which can be added directly to soil or used in compost. Coffee grounds also deter garden pests like slugs and snails. Feed and water your plants once a week with coffee solution for best results.

Frequently Asked Questions About Using Coffee Grounds for Plants

Can coffee grounds be used as fertilizer for roses?

Roses require occasional fertilizer to thrive. Coffee grounds can be used, but in moderation as they contain high levels of nitrogen which can burn the flowers if applied in excess.

What types of plants benefit from used coffee grounds?

Many plants, including blueberries, hydrangeas, azaleas, and hollies, thrive in soil with a high acidity level, which is provided by coffee grounds.

Which plants are not compatible with coffee grounds?

Plants such as Chinese mustard, Italian ryegrass, asparagus fern, and geraniums are unable to grow in soil that contains coffee grounds.

How should coffee grounds be used on plants?

It is recommended to sprinkle coffee grounds sparingly on the soil, at least a few inches away from the plant’s stem, to avoid damage.


1. What is diluted coffee?

Diluted coffee is coffee that has been mixed with water to reduce its strength. It is not as concentrated as regular coffee and has a lower amount of caffeine. Diluted coffee can be used to fertilize plants due to its high nitrogen content.

2. Can any type of coffee be used for plant fertilizer?

Yes, any type of coffee can be used to fertilize plants, but it is recommended to use coffee that is not flavored or sweetened. Flavored or sweetened coffee may contain additives that could harm your plants.

3. How do I dilute coffee for plant fertilizer?

To dilute coffee for plant fertilizer, mix one part coffee with two parts water. For example, if you have 1 cup of coffee, mix it with 2 cups of water. This will create a diluted coffee mixture that is safe for your plants.

4. How often should I use diluted coffee as plant fertilizer?

You can use diluted coffee as plant fertilizer once a week or every other week. It is important not to over-fertilize your plants, as this can cause damage. Always check the soil moisture level and make sure your plants are not already receiving too much nitrogen before adding diluted coffee.

5. Can I use diluted coffee on all plants?

Diluted coffee can be used on most plants, but it is important to check the specific needs of your plants before using it as fertilizer. Plants that prefer acidic soil, such as ferns and roses, may benefit more from diluted coffee than plants that prefer alkaline soil, such as succulents.

6. Is diluted coffee an effective plant fertilizer?

Yes, diluted coffee is an effective plant fertilizer due to its high nitrogen content. Nitrogen is an essential nutrient that plants need to grow healthy and strong. Diluted coffee also contains other beneficial nutrients, such as potassium and phosphorus, that can help improve soil quality.

7. Are there any downsides to using diluted coffee as plant fertilizer?

One potential downside to using diluted coffee as plant fertilizer is that it may attract pests, such as ants. To prevent this, make sure to mix the diluted coffee well into the soil and avoid leaving any excess on top. Additionally, diluted coffee should not be used as the sole source of plant fertilizer, as it does not contain all the necessary nutrients that plants need to thrive.

Leave a Reply

Your email address will not be published. Required fields are marked *