tomato companion planting

Tomato companion planting. When ‘companion plants’ are applied throughout the garden, they can be an effective form of pest management, allowing nature to do its’ job.

Companion planting can discourage harmful insects and pests in your garden without harming the beneficial ones.

Many plants have natural substances in their roots, flowers, and leaves that can repel or attract insects and can enhance the growth and flavor of other varieties of plants.

The following are a few companion plants to consider with your tomatoes.


Tomato Plant Companions

Companion plants for tomatoes include Basil, Oregano, Parsley, Carrots, Marigold, Geraniums, Petunias, Borage, any type of Onion or Chives.

An excellent book:

Secrets of Companion Planting for Successful Gardening


Borage | Tomato Companion


BORAGE, an edible flower (with edible leaves), is one particularly good companion plant for tomatoes. When planted nearby, it deters tomato hornworms (a type of caterpillar that will eat the leaves). Borage is considered the magic bullet of companion plants (predict a square yard for its adult size).


Marigolds | Tomato Companion

FRENCH MARIGOLD’s have roots that exude a substance which spreads in their immediate vicinity killing nematodes. For nematode control, plant dense areas of French Marigold’s. There have been studies that have proved that the nematode deterrence lasted for several years after the plants died back. The French Marigold also helps to deter white-flies when planted around tomatoes, and can be used in greenhouses for the same purpose. White-flies hate the smell of marigolds. Do not plant French marigolds next to beans.

Which are French Marigolds?


Basil | Tomato Companion

BASIL  repels flies and mosquitoes. Studies have shown that Basil can increase the yield of tomatoes. It can be helpful in repelling thrips (an insect that will feed on leaves). Do not plant near rue or sage.


Carrots | Tomato Companion

CARROTS benefit tomatoes by breaking up soil with their long roots and creating space for water and air to flow to tomato plant roots. Tomatoes benefit carrots by secreting a natural insecticide, solanine, which carrots can absorb.


Chives | Tomato Companion

CHIVES improve growth and flavor of tomatoes. They help to keep aphids away and may drive away Japanese beetles.


Petunia | Tomato Companion

PETUNIA, an edible flower (with edible leaves), will repel tomato worms.




Carrots love Tomatoes! In fact it’s the title of a book.

Be aware that if you plant carrots too close and under the eventual canopy of the tomato ‘bush’, there won’t be enough light to get good carrots. Ask me how I know…


Ants Hate Marigolds. There are a few flowers that are known to deter ants from their area. One of the best known is the marigold. Plant a few of these around the borders of your garden or near plants you want really well protected.

Apparently Mint will keep also help keep the ants away.


Don’t forget to ‘harden off’ your tomato plants. Basically you’re getting them accustomed to life outside of a greenhouse or your home.


Plant tomatoes DEEP to promote good root growth. In other words don’t be afraid to bury ~25% of the lower trunk with its leaves and all…


Let’s hear your success stories (or otherwise) about your tomato plants…

Continue reading: Ways to Tie UP your Tomato Plants

Ways to keep Weeds Down in your Garden

Your thoughts? Jump to Comment...x