What is: Insectary Plants

Insectary plants, also known as companion plants or trap crops, are specific types of plants that are strategically planted in gardens or agricultural fields to attract beneficial insects and repel or trap harmful pests. These plants play a crucial role in natural pest control and can help reduce the need for chemical pesticides.

The Importance of Insectary Plants

Insectary plants are essential for maintaining a balanced ecosystem in gardens and agricultural settings. They provide a habitat and food source for beneficial insects, such as ladybugs, lacewings, and parasitic wasps, which are natural predators of many common garden pests. By attracting these beneficial insects, insectary plants help control pest populations without the need for harmful chemicals.

Types of Insectary Plants

There are various types of insectary plants that can be used in gardens and agricultural fields. Some common examples include:

1. Nectar Plants

Nectar plants are flowering plants that produce nectar, a sugary substance that attracts beneficial insects like bees and butterflies. These insects feed on the nectar and, in return, help pollinate other plants in the area. Examples of nectar plants include lavender, sunflowers, and coneflowers.

2. Pollen Plants

Pollen plants are plants that produce large amounts of pollen, which is a vital source of protein for many beneficial insects. By planting pollen plants, you can attract insects like bees, hoverflies, and beetles that feed on pollen. Some common examples of pollen plants are daisies, marigolds, and goldenrod.

3. Shelter Plants

Shelter plants provide hiding places and shelter for beneficial insects, allowing them to lay their eggs and complete their life cycles undisturbed. These plants often have dense foliage or structures that provide protection from predators and harsh weather conditions. Examples of shelter plants include yarrow, fennel, and buckwheat.

4. Trap Plants

Trap plants are specifically designed to attract and trap harmful pests, diverting them away from valuable crops or plants. These plants release chemicals or emit pheromones that attract pests, luring them away from the main crop. Examples of trap plants include marigolds, nasturtiums, and radishes.

Benefits of Using Insectary Plants

Using insectary plants in gardens and agricultural fields offers several benefits:

1. Natural Pest Control

Insectary plants attract beneficial insects that act as natural predators of pests. This natural pest control method reduces the need for chemical pesticides, making it an environmentally friendly option.

2. Increased Biodiversity

By incorporating insectary plants, you create a diverse habitat that supports a wide range of beneficial insects. This increased biodiversity contributes to a healthier ecosystem and can improve overall plant health and productivity.

3. Cost Savings

Using insectary plants can help reduce the costs associated with pest control. By relying on natural predators, you can minimize the need for expensive chemical pesticides and reduce the risk of crop damage.

4. Improved Soil Health

Insectary plants can also contribute to improved soil health. Some plants, like legumes, have the ability to fix nitrogen in the soil, which can benefit neighboring plants. Additionally, the presence of beneficial insects can help with soil aeration and nutrient cycling.


Insectary plants are a valuable tool in sustainable gardening and agriculture. By attracting beneficial insects and repelling or trapping harmful pests, these plants contribute to natural pest control, increased biodiversity, cost savings, and improved soil health. Incorporating insectary plants into your garden or agricultural field can help create a balanced ecosystem and reduce the reliance on chemical pesticides.