Which herbs naturally repel garden pests?
Written by
Michael Sullivan
Reviewed by
Prof. Charles Hartman, Ph.D.Numerous herbs confer natural pest control through their aromas and chemical attributes. For example, basil is effective against flies and mosquitoes. Lavender repels moths and fleas from neighboring plants. I use these herbs as living barriers around my vegetable beds. Your garden receives organic protection without the use of chemicals.
The essential oils provided by these herbs contribute to the formation of a protective barrier. Basil contains eugenol in its oil, which disorients the senses of many insectivorous pests. Linalool in lavender confounds moths during their navigation. I will also crush leaves from time to time to help release more of that oil. Through all the natural chemistry that they provide, your garden is protected.
Planting Strategies
- Create perimeter barriers around vulnerable crops
- Interplant with vegetables needing protection
- Use raised beds for concentrated effects
Maintenance Techniques
- Prune regularly to stimulate oil production
- Water roots without wetting foliage
- Avoid over-fertilizing which dilutes essential oils
Harvesting Methods
- Cut in morning when oil concentration peaks
- Dry leaves for indoor pest deterrent sachets
- Make garden sprays from fresh cuttings
Strategic placement increases effectiveness. Basil cultivation near tomatoes serves to repel hornworms. Chives planted around roses will combat aphids. My borders of lavender protect whole sections of vegetables. Your susceptible plants gain complete protection.
Healthy herbs will generate more potent repellents. To promote higher oil production for maximum effectiveness, it's best to provide the appropriate amount of sunlight and drainage. If the herbs are stressed, their capacity to repel pests will decrease. I get my Mediterranean herbs tested for soil annually. Your repellent herbs are most effective when they are healthy and thriving.
Companion combos create layered protection. Pair basil with marigolds for fly protection. Use rosemary and sage against carrot flies. My herb spirals feature a combination of different repellent plant types. As your garden grows, it will naturally become more resistant to pests.
Seasonal adjustments stay true year-round. I bring my potted rosemary indoors during the winter months. I start my basil seedlings indoors in early spring, to plant in the spring. I keep chives in the garden year-round. You never need to change your pest control - it stays the same throughout the seasons.
Read the full article: 16 Herb Companion Planting Pairs Revealed
