The Wonders of the Neem Oil Soil Drench Recipe

The Wonders of the Neem Oil Soil Drench Recipe

Every gardener faces the dilemma of pests lurking in their garden. While some of these insects are beneficial insects in the garden, others cause a headache for gardeners. Using the natural approach in getting rid of pests is not only economical but it is more effective and much safer especially for the end-users, the consumers. One of the most common ways to eradicate pests naturally is by using neem oil soil drench.

There are different ways on how to control pests in your garden. Some would choose the easiest way by using chemical pesticides to eradicate them, but most farmers would prefer the more natural way.  

As a small-time gardener myself, I am inclined to know more about how to apply neem oil insecticide to the soil and the wonders it would do to my garden. Read along as we explore this topic. 

What is Neem Oil?

Neem oil is produced from neem seeds from the Azadirachta Indica tree or Neem tree. Usually, Neem trees are cultivated in Southeast Asia. It has Azadirachtin, a compound that works as a growth inhibitor, and appetite suppressor, once consumed by pests will cause them to starve and eventually die. In addition, the compound also inhibits the hormonal system of insects that prevents them from reproducing. 

Neem Oil Soil Drench Recipe

What are the Uses of Neem Oil?

Neem oil gives a lot of beneficial effects including skin and hair care, joint stiffness, pain, wound healing, and so on. However, we’ll just focus on its valuable effects on plants. These are:

  • An Organic Way of Eradicating Pests

This is the most common and effective way gardeners and farmers use to eradicate unwanted pests in their gardens and farms. It can either be used as a spray, neem cake, or soil drench. If used as a soil drench, then it will act as a systemic pesticide. It will not affect beneficial insects like bees or ladybugs because they will not eat the leaves treated with neem oil. Azadirachtin will be absorbed and distributed throughout the treated plant. Once the pests ingest any part of the treated plant, they will also take in the Azadirachtin compound. 

  • It Works as a Fertilizer

Neem cake, which is composed of the de-oiled residue from neem kernels, acts as a soil amendment for gardens. The oil will also improve the efficacy of other fertilizers by inhibiting nitrification. Neem oil root drench can protect the plant’s roots and prevents root rot.

  • It Works as a Bactericide

It prevents fire blight, a bacterial disease that makes plants appear wilt like they have been burned. To use neem oil in this case, spray it on trees when it is still in its dormant stage. 

  • It is a Fungicide

Neem oil is also effective in killing fungus in plants. Spray the plants once a week with neem oil to kill the fungi then spray it every two weeks to stop them from coming back. 

  • It Protects Your Crops

Aside from pesticide and insecticide effects, neem oil will also protect your garden from pests’ infestation. It keeps these unwanted foes from lurking again in your garden. Furthermore, insects will not be resistant to neem oil, meaning you can use it again and again either as a pesticide or as protection. It helps to control aphids, leafhoppers, mealybugs, mites, thrips, various kinds of beetles, horn fly, whiteflies, and many more.

  • It Keeps Mosquitoes Away

The neem oil extract can be applied on your skin to keep mosquitoes away, but just to be sure, try to apply a small amount of oil in your body first to see if you are sensitive to it. 

Learn How To Mix Neem Oil For Plants And Its Application Process

Why Should you Use the Neem Oil Soil Drench Recipe?

Neem oil as a soil drench is the most effective and healthiest way to use it. Here are the reasons:

  • Systematic Insecticide

As aforementioned, when you use neem oil insecticide on your soil, it works as a systemic insecticide which means that the neem oil will be absorbed by the plant roots and will be distributed throughout the plant. Once pests ingest any part of the treated plant, that fellow will face the detrimental effects of the neem oil.

  • Protects from Fungi and Bacteria

Also, neem oil will provide protection to the plant against fungal and bacterial contamination because of the compound Azadirachtin. 

  • Treat Root Rots

Neem oil that is drenched in the soil will also help treat root rots naturally.

  • Eradicates Harmful Organisms while Keeping the Beneficial Ones

Aside from that, it eradicates nematodes and other harmful soil organisms but safeguards the beneficial earthworms. 

  • It Doesn’t give Detrimental Effect on Consumers, Wildlife, Pets, etc. 

There is a small possibility that it will negatively impact people, pets, and other wildlife by using neem oil as a spray. However, using neem oil as a soil drench will eliminate the tiny possibility as the oil is absorbed by the plant. 

How to Prepare and Use the Neem Oil Soil Drench Recipe?

To make the Neem oil soil drench recipe, here are the needed ingredients:

  1. 1 quart of warm water
  2. A teaspoon of cold-pressed Neem oil
  3. Liquid dish soap
  4. Container for your neem oil spray

Mix the ingredients well. We all know that water and oil will not go together, so the liquid dish soap will emulsify the two to stabilize the mixture. Choose a dish soap that is not harsh to plants. It is important to note that you have to prepare the solution in a warm place or use warm water because neem oil will solidify in cooler temperatures. Also, do take note that warm water should be used and not the hot, boiling water as it may destroy Azadirachtin.

How To Apply Neem Oil To Soil

Now, you already have with you a Neem oil spray recipe for your soil and plants. To use this as a drench, water the soil first. Then, saturate the mixture around the plant you want to treat. Use this once a week in your plants for pest control, spray above and below the foliage. To keep these unwanted insects from lurking back to your plants, apply the recipe to drench your soil every two weeks. 

Tips To Apply Neem Oil To Soil

  • Test on a small part of the plant first, if there are no negative effects in 24 hours, treat the whole plant.
  • Apply it outdoors at sunset and not in full sun to allow the oil soak into the soil and plant.
  • Look for 100% pure Neem oil to make this drench soil recipe.
  • Store your neem oil spray out of direct light and avoid high temperatures.

More Products for Your Garden with Neem Oil


Using a neem oil soil drench recipe in the soil is one of the most efficient and beneficial ways of eradicating and keeping harmful pests in your garden. Aside from it, they also remove the tiny possibility of harmful effects on people, pets, and others. 

Now that we are made aware of its beneficial effects and how easy it is to prepare and incorporate it into our soil, we can already start using it. May you have a healthier and pests-free garden from now on.