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Blog /
Problems in the Garden

Bolster Your Garden's Defenses: 5 Soil Amendments to Deal with Pests On Plants


minute read

Written by

Revival Gardening

Blog /
Problems in the Garden

Bolster Your Garden's Defenses: 5 Soil Amendments to Deal with Pests On Plants


minute read

Written by

Revival Gardening

Do you struggle with pests on the plants in your home garden? Whether it be flowers or vegetables, those critters can ruin your day. And most big box stores will just try to sell you chemical-filled bug spray. But there’s a better way to deal with these pests–by building the defenses of your plants from the ground up. And it all starts with the soil.

Amendments to Bolster Your Soil

The health of your garden plants is fundamentally tied to the quality of the soil they're growing in. It's no secret that healthy, fertile soil results in vigorous plants, and these robust plants are significantly better at resisting pests and diseases. But what if the soil in your garden isn't up to par? What if you're constantly battling pests on your plants? The answer lies in soil amendments. By utilizing these, you can enhance your soil, bolster plant health, and effectively keep pests off your plants.

Soil amendments are substances added to soil to improve its physical properties, such as water retention, permeability, water infiltration, and drainage. They also enhance the soil's capacity to hold and release essential nutrients, helping your plants thrive. Certain soil amendments also have pest repellent properties, making them an essential tool in your organic pest control arsenal.

To help you navigate the world of soil amendments, we've identified five key ingredients you can incorporate into your gardening routine. They are proven to both rejuvenate depleted soil and deter pests on your plants.

1. Worm Castings: Mother Nature's Nutrient-Rich Defender Against Pests on Plants

A 2 lb. bag of worm castings sits among some lettuce plants.

Worm castings, otherwise known as vermicompost, are the black gold of the gardening world. Earthworms, nature's industrious soil engineers, create these castings as they consume and digest organic matter. The result is a nutrient-rich, organic fertilizer filled with beneficial microbes.

Why is this good news for keeping pests off your plants? Healthy soil, replete with nutrients and beneficial microbes, is the first line of defense against pests. Nutrient-rich soil leads to healthier plants, and healthier plants are less likely to attract pests. Worm castings serve as a slow-release fertilizer, nurturing your plants and promoting their growth over time. The beneficial microbes in the worm castings also play a role in suppressing harmful pests, creating a less inviting environment for them to thrive.

2. Karanja: An Organic, Natural Pest Repellent

Derived from the Karanja tree (Pongamia pinnata), Karanja is a natural preventative that helps to keep pests off your plants. It contains several compounds, notably karanjin and pongamol, which act in an organically defensive manner. These compounds deter pests by disrupting their feeding and reproduction, essentially breaking their life cycle and preventing infestations.

When you add Karanja cake or meal to your soil, you're not just providing it with essential nutrients; you're creating an environment that is unwelcoming to pests. Karanja creates a pest-resistant shield around your plants, preventing damage and ensuring your garden remains lush and vibrant.

3. Neem: A Versatile Defender Against Pests on Plants

Neem, obtained from the neem tree (Azadirachta indica), is a potent, natural option for pest mitigation and a popular choice for organic gardeners. Its key ingredient, azadirachtin, is known to disrupt the growth and development of a variety of pests.

Incorporating neem cake or neem oil into your soil can protect your plants from soil-dwelling pests. Additionally, using a neem oil and water mixture as a foliar spray can effectively deter pests like aphids, caterpillars, beetles, and mites that target plant foliage. Beyond its pest-deterring properties, neem also serves as an antifungal agent, providing your plants with added protection against diseases.

4. Alfalfa: The Plant Booster Against Pests

Mark holds a flower and a bag of alfalfa meal to show what can be accomplished with healthy soil.

While alfalfa is primarily known as a forage crop for livestock, it has surprising benefits for keeping pests off your plants. It contains triacontanol, a natural plant growth promoter. This compound stimulates plant growth, helping your plants to be stronger, healthier, and more resistant to pest attacks.

Adding alfalfa meal into your soil not only nourishes it with a wide range of nutrients but also gives your plants an additional defense mechanism against pests. The robust growth promoted by alfalfa makes your plants less attractive to pests, reducing the chances of an infestation.

5. Crab Meal: A Microbial Method to Ward Off Pests on Plants

Introducing crab meal into your gardening routine presents another potent solution to managing pests on plants. When incorporated into the soil, crab meal decomposes and releases chitin, a substance that beneficial soil microbes thrive on. As these beneficial microbes break down the chitin, they produce natural enzymes that deter soil-based pests.

By adding crab meal to your garden soil, you not only enrich its nutrient content but also significantly bolster the plants' inherent defense mechanisms. This heightened resistance ensures that pests on plants find your garden less inviting, maintaining a healthy and lush environment for your greenery.

Harnessing the Power of Plant Tea for Pests on Plants

While each of these soil amendments offers unique benefits in keeping pests off your plants, their potency can be amplified by combining them into a nutrient-dense plant tea. By steeping these soil amendments in water, you create a tonic rich in beneficial microbes and essential nutrients. Applying this plant tea directly to plant roots or as a foliar spray provides an all-around pest defense system, fortifying your plants from the inside out.

Incorporating soil amendments and plant tea into your garden routine can drastically improve the health of your soil and plants, making your garden less prone to pests. The healthier your soil is, the more resilient your plants will be in warding off pests. So, take control of your garden's health today and transform it into a thriving, pest-free sanctuary.

If you need further guidance on soil amendments or plant tea to prevent pests on your plants, don't hesitate to reach out. We're passionate about fostering vibrant gardens, nurturing healthy soil, and helping you to achieve a pest-free environment for your plants.

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