21 Organic Homemade Garden Spray For Plants

If you’re growing plants in the garden, there will be pests and diseases. Especially when growing vegetables and herbs.

I found people are always asking about issues their plants are facing and what they can do to get rid of those pests and diseases. That’s why I made this consolidated list of garden sprays you would find beneficial in such situations.

It’s useful to you and me to use as a reference in case we need to find what spray we can use for what kind of problem in the garden.

Let’s take a look.

1. Banana peel spray for plants

Banana peel spray is a natural and effective way to provide plants with essential nutrients and boost their growth. This organic homemade garden spray is made by soaking banana peels in water for a few days and then using the resulting liquid to spray on your plants.

Banana peels are rich in potassium, phosphorus, and calcium, which are all essential nutrients for plant growth. By using this spray, you can help improve the overall health and vigor of your plants.

Banana peel spray can also act as a natural pest repellent, helping to keep insects and pests away from your garden. It’s a simple and cost-effective solution to promote the growth and well-being of your plants.

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2. Aspirin spray for plants

Using aspirin spray on your plants can help to boost their immune system and protect them from diseases. Aspirin contains a compound called salicylic acid, which has been found to activate the plant’s defense mechanisms against pathogens.

When sprayed on the leaves, aspirin can stimulate the production of certain proteins that strengthen the plant’s resistance to infections.

Aspirin spray has been shown to enhance the plant’s ability to withstand stressors such as drought and extreme temperatures. To prepare the spray, simply dissolve two aspirin tablets in a gallon of water and spray the mixture onto your plants every two weeks.

This organic homemade garden spray is a cost-effective and easy way to promote the overall health and vitality of your plants.

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3. Eggshell spray for plants

Did you know that eggshell spray can provide a natural source of calcium to support the growth and health of your plants?

Eggshells are rich in calcium, which is an essential nutrient for plants. By making an eggshell spray, you can give your plants a boost of this vital mineral. Calcium helps strengthen cell walls, promotes proper root development, and enhances overall plant growth.

This spray can be beneficial for calcium-loving plants like tomatoes, peppers, and eggplants. To make the spray, simply crush up eggshells and steep them in water for a few days. Then, strain the liquid and use it to water your plants.

It’s a simple and effective way to ensure your plants get the calcium they need for optimal health and productivity.

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4. Molasses spray for plants

If you’re looking for a natural way to boost the health and growth of your plants, consider using molasses spray.

Molasses is a thick, sticky byproduct of sugar production that’s rich in nutrients and beneficial microorganisms. When diluted with water and sprayed onto plant leaves, it provides a wide range of benefits.

First, molasses spray acts as a natural fertilizer, providing essential nutrients like potassium, iron, and magnesium to your plants. This helps to promote strong, healthy growth.

Molasses spray can improve soil health by stimulating the growth of beneficial bacteria and fungi, which helps to break down organic matter and release nutrients for your plants.

Finally, molasses spray can also act as a natural insect repellent, deterring pests from damaging your plants.

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5. Compost tea spray for plants

To enhance the health of your garden, consider using compost tea spray, which provides a natural and nutrient-rich boost for your plants.

Compost tea is a liquid fertilizer made by steeping compost in water. The resulting tea is full of beneficial microorganisms, enzymes, and nutrients that can improve soil fertility and plant growth.

When sprayed onto the leaves and soil, compost tea helps to suppress diseases, improve nutrient uptake, and enhance overall plant health. We can use it on a wide variety of plants, including vegetables, flowers, and herbs.

To make compost tea, simply steep compost in water for a period, strain out the solids, and then apply the liquid to your plants. It’s a cost-effective and environmentally friendly way to give your garden a boost.

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6. Onion spray for plants

Boost the health of your garden by using onion spray, which can help deter pests and promote plant growth.

Onion spray is a natural and effective way to protect your plants from various pests like aphids, caterpillars, and mites. The strong odor of onions acts as a repellent, keeping these pests away from your plants.

Onion spray can also stimulate plant growth by providing essential nutrients. Onions are rich in sulfur, which is beneficial for plant development and overall health.

This spray is easy to make at home by blending onions with water and straining the mixture into a spray bottle.

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7. Coffee grounds spray for plants

Using coffee grounds as a spray in your garden can provide a natural and beneficial boost for your plants. Coffee grounds are rich in nutrients, including nitrogen, phosphorus, and potassium, which are essential for plant growth. When used as a spray, coffee grounds can help improve soil fertility, increase microbial activity, and deter pests.

The caffeine in coffee grounds can act as a natural insecticide, repelling pests like slugs, snails, and ants. Coffee grounds can help control fungal diseases, such as damping-off and powdery mildew, due to their antimicrobial properties.

To make a coffee grounds spray, simply mix used coffee grounds with water and let it steep overnight. Then, strain the mixture and spray it on your plants. It’s a cost-effective and eco-friendly way to give your garden a boost.

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8. Milk spray for plants

Milk spray is a natural and organic solution that can help protect your plants from common pests and diseases. It’s made by diluting milk with water and spraying it onto the leaves of your plants.

The proteins and enzymes in milk act as a natural fungicide and can help prevent the growth of powdery mildew and other fungal infections.

Milk spray can deter pests like aphids and spider mites, as they dislike the smell and taste of milk. This simple and cost-effective spray can be used on a variety of plants, including vegetables, fruits, and flowers.

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9. Baking soda spray for plants

Baking soda spray is a simple and effective way to control fungal diseases in your garden. It works by raising the pH level on the leaf surface, creating an inhospitable environment for fungi to grow.

This spray is especially useful for preventing powdery mildew, a common fungal disease that affects a variety of plants.

To make the spray, all you need is baking soda, water, and a few drops of liquid soap. Mix the ingredients together and spray onto the affected plants. Be sure to apply the spray evenly and thoroughly, covering both the tops and bottoms of the leaves.

Repeat every 1-2 weeks, or as needed, to keep your plants healthy and disease-free.

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10. Pepper spray for plants

Pepper spray is an effective deterrent for pests, keeping your plants safe from damage. Made from the extract of chili peppers, this spray is a natural and organic solution to ward off unwanted insects in your garden.

The strong and pungent smell of pepper spray repels a wide range of pests, including aphids, ants, and caterpillars. It works by irritating their senses and deterring them from feeding on your plants.

To make pepper spray, you can blend fresh chili peppers with water and strain the mixture to create a concentrated liquid. Dilute the solution with water and apply it to your plants using a spray bottle. Remember to wear gloves and eye protection when handling pepper spray, as it can cause irritation.

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11. Alcohol spray for plants

Using alcohol spray on your plants can help control pests and prevent the spread of diseases. It works by suffocating insects and their eggs, as well as disinfecting plant surfaces to prevent the spread of diseases.

To make an alcohol spray, simply mix rubbing alcohol with water in a spray bottle and apply it to your plants. This spray is useful for combating aphids, mealybugs, spider mites, and scale insects. It can also help prevent fungal diseases such as powdery mildew.

Be sure to test the spray on a small area of your plants before applying it to the entire plant, as some plants may be sensitive to alcohol.

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12. Citrus spray for plants

Citrus spray is a natural solution that can help protect your plants from pests and promote healthy growth. Made from the peels of citrus fruits like oranges and lemons, this spray is rich in natural oils that have insect-repellent properties.

By using citrus spray on your plants, you can deter common garden pests such as aphids, whiteflies, and ants. The strong scent of citrus also helps to mask the smell of your plants, making them less attractive to insects.

Citrus spray can boost the overall health of your plants by providing them with essential nutrients. The natural acids in citrus fruits help to nourish the soil and improve its fertility.

To make citrus spray, simply steep citrus peels in water for a few days and then strain the mixture. Dilute the resulting liquid with water and spray it onto your plants.

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13. Epsom salt spray for plants

Epsom salt, also known as magnesium sulfate, is a natural and affordable way to provide essential nutrients to your plants.

When applied as a spray, Epsom salt can help improve nutrient absorption, increase chlorophyll production, and enhance overall plant health. It’s beneficial for magnesium-loving plants like tomatoes, peppers, and roses.

Epsom salt spray can also help alleviate nutrient deficiencies, such as yellowing leaves caused by magnesium deficiency.

To make the spray, simply dissolve 2 tablespoons of Epsom salt in a gallon of water and apply it to the foliage of your plants. Repeat every two to four weeks for best results.

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14. Tobacco spray for plants

Tobacco spray is an effective and natural way to control pests and diseases in your garden. Made from steeping tobacco leaves in water, this spray contains nicotine, which acts as a natural insecticide.

It works by disrupting the nervous system of pests, causing paralysis and, eventually, death. This spray is effective against aphids, spider mites, and caterpillars.

Tobacco spray can help control certain diseases, such as leaf spot and powdery mildew, by inhibiting their growth. To make this spray, steep tobacco leaves in water overnight, strain the mixture, and then spray it on the affected plants.

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15. Vegetable oil spray for plants

Vegetable oil spray is a safe and effective method to control pests and diseases in your garden. It works by suffocating insects and preventing them from feeding on your plants.

This spray is made by mixing a small amount of vegetable oil with water and a few drops of dish soap, which helps the mixture adhere to the leaves. When applied to your plants, the oil creates a thin film that suffocates pests like aphids, mites, and scale insects.

The oil can help control fungal diseases like powdery mildew. To use vegetable oil spray, simply spray it onto the affected plants, covering both the tops and bottoms of the leaves.

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16. Cinnamon spray for plants

Made from cinnamon powder and water, this homemade spray acts as a deterrent against insects and fungal infections.

The strong scent of cinnamon repels ants, aphids, and other garden pests, keeping them away from your plants. It also has antifungal properties, which can help prevent diseases like powdery mildew and damping-off.

To make cinnamon spray, simply mix one teaspoon of cinnamon powder with one liter of water and let it steep overnight. Then strain the liquid and pour it into a spray bottle.

Apply the spray to your plants, focusing on the leaves and stems. Reapply every few days or after rainfall for maximum effectiveness.

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17. Garlic spray for plants

Garlic contains natural compounds that act as a deterrent to many common garden pests, such as aphids, beetles, and caterpillars. By spraying your plants with a garlic solution, you create a protective barrier that insects find unpleasant and will avoid.

Garlic spray is easy to make at home by crushing garlic cloves and mixing them with water. Once applied to your plants, the strong odor of garlic will repel pests and prevent them from feeding on your precious foliage. Regular use of garlic spray can help maintain a pest-free garden and promote the overall health of your plants.

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18. Vinegar spray for plants

Vinegar is a natural and effective way to deter unwanted visitors from your plants. The strong odor of vinegar repels insects, including aphids, ants, and spiders. Vinegar can help control fungal diseases like powdery mildew by creating an acidic environment that inhibits their growth.

To make the vinegar spray, mix equal parts of vinegar and water in a spray bottle. Be sure to use white vinegar, as other types may damage your plants. Spray the solution directly onto the leaves, stems, and soil around your plants.

Reapply every few days or after rainfall for maximum effectiveness.

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19. Neem oil spray for plants

Neem oil is a natural extract from the neem tree, which is native to India. We have used it for centuries as a natural pesticide and fungicide.

When used as a spray, neem oil can help control a wide range of pests, including aphids, mealybugs, spider mites, and whiteflies. It works by disrupting the feeding and reproductive cycles of these pests, ultimately reducing their population.

Neem oil also has antifungal properties, making it effective against diseases like powdery mildew and black spot.

To use neem oil spray, simply mix it with water according to the instructions on the label and apply it to your plants. Remember to spray both the tops and bottoms of leaves for optimal coverage.

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20. Soap spray for plants

One effective option for pest control in your garden is a soap spray made from common household ingredients. Soap sprays work by suffocating insects on contact, making them a safe and natural alternative to chemical pesticides.

To make a soap spray, simply mix a teaspoon of liquid dish soap with a quart of water. Shake the mixture well and then transfer it to a spray bottle. When applying the spray to your plants, be sure to cover both the tops and bottoms of the leaves, as well as any other areas where pests may be hiding.

Soap sprays are effective against soft-bodied insects like aphids, mites, and mealybugs. However, it’s important to avoid using soap sprays on delicate plants, as they can cause damage.

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21. Tomato leaf spray for plants

Tomato leaves contain alkaloids that act as a natural insect repellent, keeping pesky bugs like aphids, whiteflies, and spider mites at bay.

Tomato leaf spray can also help to prevent and control common plant diseases, such as early blight and powdery mildew. The alkaloids in the tomato leaves have antifungal properties that can suppress the growth of these pathogens.

To make the spray, simply steep tomato leaves in water for a few days, strain the liquid, and then dilute it with water before applying it to your plants.

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Fact Checked, Written, and Published by Kevin Rodrigues

Kevin is the founder of Gardening Mentor, a website that aims to teach people to grow their own food in a limited space. As a self-taught gardener, Kevin has spent several years growing plants and creating gardening content on the website. He is certified in Home Horticulture and Organic Gardening from Oregon State University. He has a Post Graduate Diploma in Horticulture and Landscape Gardening from Mumbai University.
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