Companion planting is a great benefit when it comes to gardening, particularly with crops such as fruits and vegetables. The key is to grow ones that have similar needs, such as sun exposure, watering and fertilizing. Tomatoes and limes are two plants that grow surprisingly well together, as they have similar needs. Keep in mind some key considerations when planting sweet tomatoes and lime together to make sure they grow successfully.
Pick an adequate planting site for the limes and tomatoes. Both of these crops need full sun; protection from excess wind and cold weather; and well-draining soil. This means you can plant tomatoes and limes on a slope or hill if you live in a warm climate, and at the bottom of a slope with amended soil if you live in a cooler climate. The area must be large enough to space the tomatoes at least 12 feet from the lime tree.
Prepare the planting soil if your natural dirt isn't well-draining or fertile. Rake up the top 12 inches. Add 20 percent sand, 20 percent compost and 20 percent mulch.
Plant both the tomatoes and limes. Depending on the variety of lime tree you plant, you may need to keep the tomatoes further away. (An average canopy spread of a lime tree is 12 feet wide). Tomatoes can't bear any shade, so consider the mature size of your lime tree canopy to keep tomatoes out of the shade. Also, depending on the specific variety of tomato or lime, planting instructions will vary.
Water your lime and tomatoes together, as they both require a regularly moist environment. Provide about 1 inch of water per week to each crop.
Fertilize both the limes and tomatoes together. Although tomatoes need more nutrients than lime, it is OK to provide just as much to the lime without damaging the tree. Use fertilizer once a month during watering, such as a 12-8-4 for limes and a 5-3-4 for tomatoes.