Lavender is a way to bring more pollinators into your garden such as bees and butterflies, so planting the herb close to tomatoes could increase the number of them in your patch. If bees are around, the pollinators will help tomato plants set fruit, which is the process of the yellow flowers turning into juicy tomatoes. Although they’re considered self-pollinating, tomato plants still need some help with the fertilization process. The plant’s flowers must be moved in some way (either by wind or bees) for them to release pollen. Bees are great at helping with this, and improve the odds of a promising harvest. Lavender also has a compound in it that reduces the aggressiveness of bees while they’re buzzing around your crops, which might give you some peace of mind too. In addition to bees, you can also expect lavender to attract gorgeous butterflies, and you can expect them to pollinate your crops.

Besides attracting good insects, lavender also can keep away bad insects that are known to disturb tomato plants. The smell of the herb drives away unwanted flying insects like obnoxious whiteflies.

Source: housedigest.com