Do Peace Lilies Like Coffee Grounds? 3 Must-know Tips

Peace lilies, also known as Spathiphyllums, are a popular houseplant known for their beautiful white flowers and air-purifying abilities. They’re relatively easy to care for and can thrive in low-light environments.

However, like all plants, peace lilies need certain nutrients to grow and stay healthy. One question that often comes up is whether or not coffee grounds are good for peace lilies.

In this article, we’ll explore whether peace lilies like coffee grounds, the benefits and drawbacks of using them, and how to properly use coffee grounds for your peace lilies.

Do Peace Lilies Like Coffee Grounds?

The answer to this question is both yes and no. While peace lilies can tolerate the presence of coffee grounds in the soil, they don’t necessarily thrive on them. Coffee grounds have a slightly acidic pH, which can affect the soil pH over time. Peace lilies prefer a slightly acidic to neutral pH range of 6.0 to 7.0.

Therefore, if you decide to use coffee grounds as a fertilizer, it’s important to monitor the pH levels of the soil to ensure they remain within the ideal range for peace lilies.

Benefits of Using Coffee Grounds

Nutrient Boost

Coffee grounds contain several essential nutrients that can benefit peace lilies. They are a good source of nitrogen, phosphorus, potassium, calcium, and magnesium. These nutrients play a vital role in promoting healthy foliage growth, strong root development, and vibrant flowers. Incorporating coffee grounds into the soil can provide an additional nutrient boost to your peace lilies.

Organic Matter

Coffee grounds are considered organic matter, which helps improve soil structure and fertility. They enhance the soil’s ability to retain moisture, increase aeration, and facilitate nutrient absorption. Adding coffee grounds to the soil can improve its overall quality, creating a favorable environment for peace lilies to thrive.

Pest Deterrent

Coffee grounds are known to repel certain pests and insects due to their strong aroma. They can act as a natural deterrent against common garden pests like slugs, snails, and ants. By using coffee grounds around your peace lilies, you may be able to protect them from potential pest infestations.

small green plant putted in coffee ground bowl

Drawbacks of Using Coffee Grounds

pH Imbalance

As mentioned earlier, coffee grounds have an acidic pH. While peace lilies can tolerate slightly acidic conditions, excessive use of coffee grounds or using them on already acidic soil can lead to an imbalance in pH levels. This can result in nutrient deficiencies and hinder the plant’s ability to absorb essential minerals.

Nutrient Overload

Coffee grounds, when used excessively, can cause nutrient overload in the soil. This is especially true if you’re using coffee grounds as the sole source of fertilizer for your peace lilies. It’s recommended to use coffee grounds in moderation and combine them with other organic fertilizers for a well-rounded nutrient supply.

Molding and Fungal Growth

Coffee grounds have a high moisture content, which can create favorable conditions for mold and fungal growth in the soil. If not managed properly, excessive moisture can lead to root rot and other fungal diseases that can harm peace lilies.

Insects Attraction

While coffee grounds can repel certain pests, they can also attract others. Some insects are attracted to the smell of coffee, including fruit flies and certain beetles. Therefore, it’s important to be aware of the potential for increased insect activity when using coffee grounds in your garden.

Salt Accumulation

Coffee grounds can contribute to salt accumulation in the soil over time. This can happen when coffee grounds are used excessively or if the water used for watering peace lilies is high in salts. Salt accumulation can be detrimental to the health of peace lilies, causing leaf burn and hindering nutrient uptake.

Tips to Use Coffee Grounds for Peace Lilies

If you’re considering using coffee grounds for your peace lilies, here are some tips to keep in mind:

Use coffee grounds in moderation.

As previously discussed, coffee grounds can make soil more acidic over time, so it’s essential to use them sparingly. A general guideline is to include no more than 10-20% coffee grounds in your soil mix.

Mix coffee grounds with other organic matter.

To prevent soil from becoming overly acidic, mix coffee grounds with other organic matter such as compost or peat moss.

Don’t use coffee grounds exclusively.

While coffee grounds can add nutrients to the soil, they shouldn’t be the sole source of nutrients for your peace lilies. Make sure to also use a balanced fertilizer to provide your peace lilies with all the essential nutrients they need.

Other Organic Matter to Use for Peace Lilies

While coffee grounds can be used as an organic matter to supplement the soil for peace lilies, there are other options available as well.

  • Compost: Compost is an excellent organic matter to enrich soil for peace lilies. It contains various essential nutrients like nitrogen, phosphorus and potassium which helps keep the soil moistened.
  • Leaf mold: Leaf mold is created by composting fallen leaves and is a great source of organic matter for peace lilies. It is rich in nutrients and can help to improve soil structure.
  • Peat moss: Peat moss is a widely-used organic matter for indoor plants, including peace lilies. It helps improve soil drainage, retain moisture and supplies essential nutrients to the plant.
  • Well-rotted Manure: Aged or well-rotted manure can be mixed into the soil to provide a nutrient boost for peace lilies. It enriches the soil with organic matter and releases essential nutrients gradually as it breaks down. Ensure that the manure is well-composted to prevent any adverse effects on the plants.
  • Worm castings: Worm castings are a nutrient-rich organic matter that can be added to the soil to provide essential nutrients to peace lilies. They contain a balanced mix of nitrogen, phosphorus, and potassium, as well as other micronutrients that plants need.
mix organic matter with coffee ground

When using organic matter, it’s important to use it in moderation and mix it with the soil properly. Using too much organic matter can lead to nutrient imbalances and water retention issues, which can harm your peace lilies. A balanced approach to soil amendments will help your peace lilies thrive and keep them healthy.

Frequently Asked Questions

Can coffee grounds burn peace lilies?

Yes, coffee grounds can burn peace lilies if used in excess. To avoid this, use coffee grounds in moderation and mix them with other organic matter.

How often should I use coffee grounds for my peace lilies?

Use coffee grounds as a supplement to your regular fertilizer routine, no more than once a month.

Can I use used coffee grounds for my peace lilies?

Yes, used coffee grounds can be used for your peace lilies, but they contain less nutrients than fresh coffee grounds.


While peace lilies can tolerate coffee grounds, they don’t necessarily benefit from them. Coffee grounds can make the soil too acidic, which can harm your peace lilies. However, using coffee grounds in moderation can repel pests, add nutrients to the soil, and improve soil structure.

If you decide to use coffee grounds, remember to collect used coffee grounds, dry them thoroughly, and then incorporate them into the soil around your peace lilies. Regular watering and monitoring of moisture levels will help activate the nutrients and ensure the well-being of your plants. Additionally, it’s important to avoid excessive use of coffee grounds and consider combining them with other organic fertilizers for a balanced nutrient profile.

Thank you for taking the time to read this comprehensive guide on how to use coffee grounds for peace lilies. We hope that the information provided has been helpful in enhancing your understanding of this organic method for plant care. If you have any further questions or need additional assistance, feel free to reach out. Happy gardening!