Tomato plants, in general, need six to eight hours of direct, bright sunlight per day for healthy growth. Some varieties may be grown in lower levels, but they need as much light as possible because they are dense. Water, nutrients, and pruning are also all essential for maintaining healthy, fruiting tomato plants. Growing great tomato plants starts with understanding their ideal conditions. From growing them in pots versus in the ground, to ensuring they have the right fertilizer and soil, there's a lot to consider. Add to the list: direct or indirect sunlight. For tomatoes to really grow their best, and not get scorched or become leggy, they need the perfect amount of light in your garden. So we turned to gardening pros to find out whether tomatoes should be grown in direct or indirect sunlight for your best crop this season. Direct vs. Indirect Light: What Do Tomatoes Need? According to Kathi Rogers, writer and gardener at Oak Hill Homestead, tomatoes need six to eight hours of full, direct sunlight. "Sunlight is essential for photosynethesis, which is how tomato plants convert sunlight into energy to grow and and produce fruit (the tomatoes)," she says. "The plants use the sun's energy to grow deep roots, strong stems, leaves, and flowers and fruit." Lindsay Springer, Director of Plants, Nutrition, and Digital Agriculture at Gardyn, agrees, and says that eight hours of direct sunlight "will yield excellent plant growth, flowering, and fruit." "The UV spectrum of light is essential to sync the balance of sugar and flavor ripening processes—along with the development of healthy antioxidants," she says. Can You Grow Tomatoes in Indirect or Lower Light? In general, all tomato varieties should be grown in direct sunlight, and that is a basic requirement for the plant. However, Steven Corcoran, CEO of Lawn Love, says there may be a small handful of exceptions—with some caveats. "There are some variations that may be able to tolerate a bit more indirect light or shade than others, like cherry or Mama Leone tomatoes, but generally tomatoes like direct sun," Corcoran says. "These plants simply need that direct sunlight to thrive." Corcoran says that, because tomato plants can become dense as they grow, it's important to provide them with as much sunlight as possible to ensure enough filters through to the plant. "It definitely helps to prune them a little bit and provide them with support to allow more sunlight to filter in," he says. More Tomato Growing Tips Springer also had some other essential tips for growing your healthiest tomato plants this season: Tomato plants are heavy feeders, and will require lots of water and nutrients during their flowering and fruiting phases, Springer says. If you don't have an outdoor space, or don't have enough sunlight, Springer recommends using grow lights (which can even be used year-round indoors). To reduce the risk of disease, "water your plants at the base of the stem, not overhead on the foliage," Springer says. Prune branches that are rubbing against each other, are low to the ground, or have leaves that are turning brown, to ensure healthy airflow, Springer says.




