Making homemade organic fertilizer with onion skins is easy and odorless. It is easy to store and suitable for all kinds of plants: outdoor, indoor and vegetable. If used correctly, it has no adverse effects.

Answers to frequently asked questions about suitability, growth, side effects, application and manufacturing process can be found in this article.

What is onion skin fertilizer? Onion skin fertilizer is a natural organic fertilizer made from onion skins. This homemade fertilizer is made using the nutrient-rich properties of onion skins.


This process involves extracting beneficial compounds from the skins, creating a solution that can improve plant growth and health.

1. Container: Use a plastic, glass, or jar container. Pack with dry onion skins and avoid wet pulp to avoid odor and mold.

Onion Skins in a Jar

Note 1:

Do not use wet onion pulp as it may rot, emit unpleasant odors, or develop fungi.

In addition, tonics made from wet pulp cannot be effectively preserved.

Note 2:

If you choose dry skins, make sure the tonic will not cause problems such as attracting ants or breeding fungi in the soil when you use it later.

2. Soaking: Soak the shells in water. Cover and keep in a cool place (out of direct sunlight) for 24 hours.

Onion skins Fertilizer Water

3. Purple solution: After 24 hours, a purple solution suitable for seedlings will be formed. Mix 2-3 spoons in water and feed to seedlings. 5 Tips to Make Onion Skin Fertilizer at Home
Liquid Fertilizer from Onion Skins
Fertilizer for Seedlings from Onion Skins

4. Stir daily for 4 days. Stir daily for 4 days to create a thick tonic for leafy plants.

Leave for 4 days, stirring daily, and you will have a thick tonic for leafy plants.
Strain and mix with 3 times the amount of water if necessary and feed to your plants.
Strained Onion Skin Fertilizer for Seedlings

5. Soak the pulp in water for 7 days. Soaking the pulp for 7 days will give you a dark brown tonic.

After 7 days, strain it well and do not store it any further.
Mix the strained tonic with 3 times the amount of clean water and use it as fertilizer for fruiting and flowering plants.

Precautions to take before fertilizing

1. Strain properly: Be careful not to let the onion pulp get into the soil. Be sure to strain the solution well before applying to your plants.

2. Till the soil: Till the soil thoroughly before applying onion skin tonic.

3. Don't fertilize wet soil: Make sure the soil is dry before applying liquid fertilizer, as soil that is too wet can prevent fertilizer absorption.

4. Avoid dosing in extreme temperatures. Dosing tonic should be done in the early morning or evening.

Avoid dosing during full sun or in the afternoon.

Fertilizing hot soil during sunny periods can burn the plants.

When to use onion skin fertilizer
Onion skin tonic can be used at any time of the year including summer, winter and monsoon seasons, but avoid using it during the dormant period of the plant.

1. Summer dormancy: Some plants, such as tulsi (tulsi basil), curry leaf, hibiscus, mint, and Mexican mint, thrive in the summer but go dormant in the winter.

2. Dormancy: Even plants that are more associated with winter, such as roses and chrysanthemums, can go dormant in mid-summer. Avoid using onion skin fertilizer in summer.

3. Can be used all year round: You can feed your plants with onion skin all year round, indoors or outdoors, except for certain dormant periods.

How to use liquid onion skin fertilizer

1. Outdoor plants: Feed once a month. For flowering or fruiting plants in their prime (roses in winter, hibiscus in summer, etc.), use twice a month.

2. Houseplants: Fertilize with onion skin fertilizer once every two months.

3. Spray option: Dilute the tonic with four parts water and spray the plants every 15 days. The visible difference is not great, but there are no side effects.

Notice:

Onion skins provide nutrients, but it is recommended to use other fertilizers to achieve a balanced nutritional profile. Avoid using other fertilizers, Epsom salts, tonics, seaweed, banana peels, and other substances for 10 days before and after applying onion skin fertilizer.

How to store onion skin tonic

1. Use an airtight container: Store any remaining tonic in an airtight container in a cool place away from direct sunlight. However, do not store it in the refrigerator.

2. Shelf life: Since it is homemade and does not contain any preservatives, the shelf life will vary depending on the temperature and weather.

In hot weather it lasts for 3-4 days and in cold weather it lasts for 10-15 days. On average, it lasts for about 7-8 days. 3. Check regularly: Open and shake the container every 2-3 days.

Smell it before using. If it smells bad, don't use it. If it's odorless, it's safe for your plants. Good! Add liquid onion skin fertilizer to your gardening routine and you can expect noticeable improvements. Discover the positive effects on your plants and see the positive changes.