Sugar Water Tomato Plants . For seedlings, take extra care to not soak the soil, but don’t let the topsoil dry completely. Most garden crops, such as tomatoes, respond well to maximum sunlight, while other indoor plants may require less sunlight in order to photosynthesize. Tomatoes Exporters from India NK Agro from www.nkagro.com You may have to water daily while the plants are young and —depending on the temperature—you may have to water twice. The sun sugar tomato plant will grow in most soil types, however, it needs nutrients for the production of tasty sweet fruits laden with flavor. Once the weather cools and fruit has set, scale back watering to once a week.