Why Do Tomato Plants Smell Bad?

Tomato plants are a popular garden staple, prized for their flavorful fruit that can be used in a variety of dishes. However, many gardeners have noticed that tomato plants come with a distinct aroma that can be quite strong and unpleasant. In this article, we'll explore why tomato plants smell bad and see what can be done to reduce the odor.

The Culprit: Tomatine

The main cause of the unpleasant smell from tomato plants is a toxic alkaloid called tomatine. This substance is found in all parts of the tomato plant, including the leaves, stems, and fruit. It's a natural insecticide that helps to protect the plant from pests, but it also gives off a distinctly unpleasant odor that can be quite overwhelming.

Tomatine is also responsible for the bitter taste of unripe or green tomatoes. As the fruit ripens, the levels of tomatine decrease and the flavor becomes sweeter and more enjoyable.

Reducing the Odor from Tomato Plants

If you're a gardener who's been bothered by the smell of your tomato plants, there are a few things you can do to reduce the odor:

Prune your plants: Tomatine is most concentrated in the leaves and stems of the tomato plant, so pruning these parts can reduce the amount of odor that the plant gives off. Be careful not to remove too many leaves, though, as they're necessary for photosynthesis.

Plant herbs nearby: Some herbs, such as basil and mint, have a strong, pleasant aroma that can help offset the smell of your tomato plants.

Choose low-odor varieties: Some tomato varieties are known to have a milder smell than others. Look for varieties like Sweet Million, Sungold, or Green Zebra if you're particularly sensitive to odors.

Conclusion

Tomato plants are a great addition to any garden, but their strong odor can be off-putting for some. The culprit is the toxic alkaloid tomatine, which is found in all parts of the plant. By pruning your plants, planting herbs nearby, or choosing low-odor varieties, you can reduce the smell and make your tomato plants a more enjoyable addition to your garden.