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Using Banana Peel Water for Plants: The Benefits Explained


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Banana peel water is a nutritional kitchen byproduct that can be used to fertilize plants because the minerals it contains are essential for plant growth and development.

Minerals and nutrients, when extracted from banana peels can be used to fertilize plants. Banana peel water supplies plants with a substantial amount of potassium (K), a macronutrient that is used to develop immunity to environmental stress and pests while at the same time, promoting healthy plant growth.

Bananas are a very common fruit in the kitchen. The peels can provide our plants with vital nutrients apart from potassium, which it is known for. 

This article explains everything the banana peel has to offer as well as the different methods you can use to effectively extract and add the nutrients to plants.

The Benefits of Using Banana Peel Water on Plants

Banana peels water

What is Banana Peel Water?

Banana peel water is nutrient-rich water obtained from boiling banana peels. It provides the plant with an organic source of nutrients that promotes plant growth while preventing deficiencies associated with low potassium which includes brown scorching and curling of leaf tips.

Banana is a good source of vitamin C, dietary fiber, manganese, and potassium.

The mineral nutrients within the banana peels are leached into the water during the boiling process. The high temperature of the boiling water breaks down the fibers of the peel which allows the potassium and manganese to easily move into the water.

Boiling usually takes between 30 to 45 minutes to give enough time for the mineral leaching to occur. The water is then obtained from straining the banana peels and allowed to cool.

It is important to note that not all the minerals are removed from boiling and the peels themselves still have a good amount of minerals within them.

The peels can still be dried off and reused on plants as an additional source of slow-release minerals which we will discuss further in this article.

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MyLifeUNIT Plastic Watering Can green

Applying banana peel water to your plants can also be effectively be done by using the bottom watering method.

How is Banana Peel Water Beneficial for Plants: Explained

The water obtained from the banana peels contains minerals that plants need in order to produce green and healthy leaves.

Banana peel water provides an economical and environmentally friendly way of supplying organically derived essential minerals to plants.

Although the banana peel does not make up a significant portion of the banana, it has the same type of minerals contained in the edible portion of the banana.

The main mineral derived from the banana peel is the macronutrient Potassium (K).

Here is a breakdown of the mineral content which can be derived from a medium-sized banana.

Minerals Present in Banana

The nutrition facts for 1 medium-sized banana (100 grams):

MineralQuantity (mg/g)Used For
Potassium (K)78.10The movement of water and nutrients, Regulates photosynthesis
Magnesium (Mg)31.9 Promotes photosynthesis and green leaves
Manganese (Mn)76.20Root growth and resistance to pathogens, Photosynthesis
Sodium (Na)24.30Helps with metabolism and synthesis of chlorophyll
Calcium (Ca)19.20Provides structural support to cell walls
Iron (Fe)0.61Synthesis of chlorophyll and Green leaves
Protein1.3

The Benefits of Potassium in Plants

Potassium is a mineral and an electrolyte, which conducts electrical impulses in the human body. In plants, this electrolyte performs a similar task in the transportation of water and sugars.

It’s classified as a macronutrient because plants take up large quantities of potassium (K) during their life cycle. Other macronutrients that plants use are Nitrogen (N) and Phosphorus (P). These three are the nutrients plants need most and form the basis in the manufacture of fertilizers (NPK). 

This is why, fertilizer when bought, has a number affixed to the individual letter, which signifies the available amount of the nutrient present in the fertilizer.
(X-N, X-P, X-K)

Potassium Deficiency in plants

Typical symptoms of potassium deficiency in plants include brown scorching and curling of leaf tips as well as chlorosis (yellowing) between leaf veins. Purple spots may also appear on the leaf undersides. Plant growth, root development, and seed and fruit development are usually reduced in potassium-deficient plants. [Source, Wiki]

Using banana peel water on plants can prevent deficiency symptoms related to low potassium levels.

Potassium helps Plants fight Pests and Diseases

Potassium helps plants develop an all-round immunity to environmental stress caused by changing weather conditions.

Plants deficient in potassium are less resistant to drought, excess water, and high and low temperatures. They are also less resistant to pests, diseases, and nematode attacks.

When used on houseplants, potassium can strengthen a plant’s resistance to fungus gnats, bacterial infections, and root rot.

Basically, it can boost a plant’s ability in dealing with over-watered conditions which can lead to the above-mentioned problems.

How to Make Banana Peel Water?

Banana peel water can be made by boiling or soaking the peels in water for a period of time. Additionally, soaking the peels in water and allowing it to sit for some time can also draw the minerals out from the peels and into the water.

These are the Methods for obtaining the banana peel water:

Banana Peel water from Boiling

Boiling Banana peels

Use this method to obtain banana peel water from boiling. The amount of peels to use depends on the amount you have available at the time.

  1. Place the peels in a cooking pot
  2. Pour water and cover 1 inch above the peels
  3. Stir properly
  4. Place on medium heat (350 oF)
  5. Allow to boil for 30 – 45 minutes
  6. Strain the peels and save the water residue

If the resulting residue is too thick you can also add water to thin it down for addition to your plants.

Banana Peel water from Pulverizing 

Banana peels in blender

Banana Peel water obtained from pulverizing follows the same steps as from boiling (stated above).

The only difference is that the banana peels are broken up into small pieces in a blender before it is boiled.

This increases the surface area of the banana skin being exposed to boiling water. As a result, there is potentially a higher concentration of minerals that can be obtained from the peel using this method.

Banana Peel water from Soaking in Water

soaking Banana peels in jar

Obtaining banana peel water from soaking requires the peels be left in water for a period of time for the minerals from the peels to be leached into the water.

Method:

  1. Place approx. 5 banana peels into a medium sized jar
  2. Fill the jar with water 
  3. Cover the lid and seal the jar
  4. Allow to sit for 10 to 15 days

The peels will turn black as time passes and the water will also change color. After the time has passed, strain the water from the peels and apply to your plants.

Tip: Breaking the peels into smaller pieces will help speed up the soaking process.

Using Pulverized Banana Peels on Plants

After boiling there is still a significant amount of minerals still trapped within the peel. However, the leftover peels can still be used to maximize its benefits.

The leftover peels are dried to ensure all the moisture is removed and then pulverized into a powder or as fine as possible. This makes it easier for it to break down and release its minerals when added to the soil.

Pulverizing increases the surface area of the peels which increases the rate at which it releases nutrients into the soil. 

Adding the peels to the soil without breaking it up will allow for a much slower release of minerals into the soil as bacteria will take more time to break it down.

Method for Pulverizing Banana peels:

  1. Take 5 or more banana peels and place is in a dry area or outside in the sun
  2. Allow the peels to dry for 2 -3 days
    (the skins will become dark and hard as the water is released)
  3. Place the dried banana peels in a blender and blend for 1 minute
  4. Remove the pulverised peels and add to any plant soil around the base of the plant stem.
  5. Cover the powdered peels with soil so that the decomposition process can occur faster.

Using Banana Peel Water with Succulents 

Banana peel water can be used to water succulents while adding vital nutrients at the same time. The mineral-rich water should be thinned so that it can be applied as a spray as succulents require more dry aerated soil. 

Succulents can be misted with a solution of banana peel water during their normal watering schedule. Succulents require a small amount of water and nutrients at any given time. 

Misting succulents with banana peel water is a sure method of providing them with the minerals from the banana peels without overwatering and causing problems associated with overwatered soil.

How to Mist Succulents with Banana Peel Water 

  1. Any household spray bottle can be used as long as it is cleaned properly.
  2. The water should be thin enough for the spray bottle to expel the water
  3. Add the peel water in the spray bottle
  4. Spray or mist the plant on the top as well as the underside of the leaves
  5. Also, spray the top soil with the water.

Misting should be done during the morning periods or late evenings to allow the plant to absorb moisture and nutrients. This also prevents the heat of the day from drying out the moisture too quickly.

I was surprised at how cheap I was able to buy this Plant mister spray bottle from this listing on Amazon, and it works amazingly well. You can see it by clicking here.

Bottom Watering with Banana Peel Water

Bottom watering plants with banana peel water is another way plants can benefit from minerals from the banana. Bottom watering will allow for the banana peel water to be absorbed thoroughly into the soil without having it in an overwatered state. In doing so, the total mass of the plant roots will be able to access the nutrients provided by the water.

Bottom watering is an effective method of watering plants that ensures that the entire root structure gets water without the risk of overwatering your plants. See the bottom watering plants article here.

Bottom watering My plant

How to bottom water with Banana Peel water

  1. Use a a small, flat container two inches larger than the plant pot
  2. Place the plant into the container
  3. Add the banana peel water so that the water level reaches 1 to 1 ½ inches high on the side of of the plant pot
  4. Allow the plant to sit in the water for 15 to 20 minutes
  5. After the time has passed stick your finger in and test the soil for moisture
  6. Once you feel that the soil is moist (not wet) you can remove the plant.
  7. Place the plant to drain out any excess water 

See our helpful article on how to apply fertilizer when bottom watering which will give helpful insights on how to properly add nutrients to plants when bottom watering.  

Interested in bottom watering trays? I have found durable trays which worked well for all my plants. You can click here to see them on amazon.

Plants that Banana Peel Water is Effective on

Banana Peel water can be effective on all plants as it provides vital nutrients for plant growth. However, the method of application would differ depending on the type of plant that it is being applied to.

PlantsWatering Method
SucculentsMisting
Indoor PlantsMisting, Top Watering, Bottom Watering
Garden Plants Top watering, Soil application via Sprayers.

What are the Precautions When using Banana Peel Water

When using Banana Peel water in the soil you should always ensure that the water is at ambient or room temperature so that it does not kill the bacteria in the soil and harm the plant. 

This precaution is applicable if you are using the water from boiled Banana Peel.

Additionally, banana peel water is a  good additive to the soil but care must be taken when watering as it can be easy to overwater the soil which can lead to root rot and yellowing of the plant leaves.

Our recommendation is to use the bottom watering method to ensure that the plant is getting the right amount of water for optimal growth.

When misting, ensure that the water is properly strained to remove banana particles that would easily clog the nozzles of the misting bottle.

Here is our article on adding fertilizer when misting which gives detailed insights on how quickly plants absorb fertilizer when applied via misting and how to correctly do it.

Using Fermented Banana Peel Water as a Pesticide

The benefits of using fermented banana peel water have been proven to encourage a good bacterial population which in turn promotes healthy root growth. 

Additionally, fermented banana peel water produces a sour alcohol-like aroma which wards away unwanted pests like lizards, snakes, and iguanas from the garden.

Additionally, insects like fruit flies, gnats, plant lice, flea beetles, aphids, and other pests can be reduced using fermented banana peel water as the alcohol from fermentation acts like an irritant to these small insects which can also kill them.

How to make Fermented Banana Peel Water

  1. Use any available jar
  2. Fill ¾ of the contents with banana peel water
  3. Mix in 1 teaspoon of sugar with the water
  4. Mix in 4 tablespoons of liquid milk
  5. Cover the jar and allow it to sit for 3 – 4 days
  6. After the time has passed the solution will turn from opec to translucent.

The resulting solution can now be used as pest control for both houseplants and in the garden.

Other Kitchen Scraps that can be Used as Plant Fertilizers

Kitchen scraps can be used to provide plants with a cost-effective and organic means of fertilizer. There are many items from the kitchen that are used daily that can supply nutrients and minerals to your plants by either adding directly to the soil or by boiling or soaking in water. 

Boiled Egg Water on Plants

Eggshell water can be used to water plants because it provides the plant with calcium minerals and amino acids. Calcium is used by plants to strengthen stems and leaves while providing structural support for cell walls. Supplying a sufficient amount of calcium results in rapid and healthy plant growth.

You can find the full and detailed article here.

Using potato water for plants follows the same principle and is a much more common kitchen byproduct.

Watering Plants with Pasta Water

Pasta water can be used to water plants because it provides (NPK) fertilizer and minerals for plants to effectively use while promoting a healthy bacteria population. This results in healthy plant growth. Pasta water can also be applied using any watering method and can also ward off unwanted pests when fermented.

You can find the full and detailed article here.

Using Rice Water on Plants

Rice water can be used to water plants because it provides nutrients and minerals for plants to effectively use while promoting a healthy bacteria population. This results in healthy plant growth. It can also be applied using any method and can also ward off unwanted pests when fermented. 

See how this can be done from our detailed article here.

Using Plantain Peel Water on Plants

Using Plantain peel water on plants follows the same steps as banana peels since they can also provide plants with a significant amount of potassium (663 mg) and magnesium (57mg).

Plantain peel water can also be added to a plant’s fertilizer regime either by top watering, bottom watering, or even misting.

The Takeaway

Banana Peel water can be very beneficial to plants by adding valuable minerals and nutrients to the soil. It helps increase bacterial growth which in turn breaks down organics compounds within the soil making nutrients easily available for plants to use.

Banana Peel water can be obtained from either soaking the Banana Peel in water or through boiling and is a cost-effective method in providing plants with organic fertilizer.

Additionally, it can be applied through any watering method both on indoor plants and in the garden.

Banana Peel water can also be used as a pesticide that can ward off large pests in the garden and even small flies, gnats, and flea beetles.

The overall result of using Banana Peel water on your plants is healthy growth and increased fruit and crop production.

JayLea

JayLea has a passion for plants and has been gardening since 2015. He has valuable knowledge about gardening and houseplant care and can answer everyday practical questions that every plant owner has.

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