Dennis Williams Realtors Logo
You are here: Dennis Williams Realtors / Latest News / Useful Plants That Repel Insects

Useful plants that repel insects


Useful plants that repel insects

Global warming has really influenced the distribution patterns of many insects, with the fall army worm, in particular, really plaguing our grain farmers, to name just one of the many insects affecting South Africans.

The good news is that there are some common plants which act as really effective repellents.

Petunias are an excellent natural pesticide repelling aphids, asparagus beetles, squash bugs and tomato hornworms. The flowers are particular popular as they come in a variety of colours, require very little maintenance and can be grown in containers, hanging baskets and flower beds.

Nasturtiums are an all-time favourite in our garden, we eat the leaves and flowers when we are coming down with the flu as it sends those flu viruses running. Not only flu gets deterred by this wonderful plant; white flies, aphids, many beetles and cabbage loopers are repelled by this plant. Nasturtiums are excellent for companion planting around herbs, veggies and roses.

Marigolds are brilliant, I can remember my gran having hundreds of them in her garden. They really do have a pungent smell; this deterred me from buying them for many years. Only recently have I started using them again, they come in a variety of colours too. Marigold roots are used to repel nematodes, the rest of the plant repels aphids and even mosquitos. Marigolds have been known to spur on roses; this definitely makes it another great companion plant.

Chrysanthemums have an ingredient called pyrethrum which makes them an effective insect repellent. They repel ants, roaches, ticks, lice, feas, bedbugs and spider mites. Be careful when making a spray using Chrysanthemum flowers, pyrethrum can be a carcinogenic to humans.

Geraniums including indigenous and exotic varieties, are brilliant at repelling aphids and make excellent companion plants around roses.

Moving to the herbs: 

  • Bay leaves repel flies
  • Chives repel aphids, carrot flies and certain beetles.
  • Dill repels aphids, squash bugs, spider mites and tomato hornworms.
  • Fennels repels slugs and snails
  • Parsley repels aphids, slugs, snails and beetles
  • Rosemary repels mosquitos
  • Mint repels mosquitos and rats.
  • Lemon thyme repels mosquitos
  • Lavender repels moths, fleas, flies and mosquitos
  • Basil is excellent for repelling flies and mosquitos
  • Coriander repels the potato beetle as well as aphids.
  • Onions repel ants and aphids.

Planting many of these plants and herbs within your garden will repel the insects but your garden will not be insect-free. Try encouraging non-pests to your garden, such as lady bugs, which help control aphids too. A healthy garden will have bees, butterflies insect eating birds, mammals and reptiles. Planting indigenous plant species will encourage these beneficial insects and animals into your garden. A garden that is unhealthy will have more pests and diseases.

If you are unsure and would like some assistance with your garden, call a professional landscaper to give you advice or send us an email with a photo we will do our best to assist you.

Published 28 Jun 2017 / Views -
Disclaimer:  While every effort will be made to ensure that the information contained within the Dennis Williams Realtors website is accurate and up to date, Dennis Williams Realtors makes no warranty, representation or undertaking whether expressed or implied, nor do we assume any legal liability, whether direct or indirect, or responsibility for the accuracy, completeness, or usefulness of any information. Prospective purchasers and tenants should make their own enquiries to verify the information contained herein.