Yes, some vegetables can be grown indoors without grow lights if they receive strong, consistent natural light from a bright window. In practice, this works best for small, fast-growing vegetables rather than large or fruiting plants.
Vegetables that stay compact, such as leafy greens and many herbs, are the most practical choices for windowsills and smart gardens. These plants do not need a lot of height or deep roots and can grow well with several hours of good daylight each day.
Larger vegetables, such as tomatoes, peppers, or root crops, usually become impractical without grow lights. They require more light, more space, and more vertical height than most indoor environments can provide.
In everyday indoor setups, grow lights are not strictly required, but they make results far more reliable, especially during winter or in homes with limited sunlight.
