Too Much Water Watering your tomato plants properly is probably the main key to tomato success. Too much water and the plants drown—too little and you get blossom end rot. Inconsistent watering can also get you blossom end rot, split tomatoes, and stressed plants. Before you water, check if your soil is already moist.Click to see full answer. In respect to this, how do you treat an overwatered tomato plant? Rescue Techniques for Wilting Plants Move your plant to a shady area even if it is a full-sun plant. Check your pot for proper drainage and, if possible, create additional air space around the roots. Water only when the soil is dry to the touch, but do not let it get too dry. Treat with a fungicide. One may also ask, how do you know if your over watering your tomato plants? 5 Signs of Overwatering Wet and Wilting. It looks wilted, but the soil is wet. Brown Leaves. If the leaves turn brown and wilt, there is the possibility that you have been overwatering. Edema. The third sign that your plant has been overwatered is edema. Yellow Falling Leaves. Root Rot. Keeping this in consideration, how often should tomatoes be watered? Water newly planted tomatoes well to make sure soil is moist and ideal for growing. Early in the growing season, watering plants daily in the morning. As temperatures increase, you might need to water tomato plants twice a day. Garden tomatoes typically require 1-2 inches of water a week.How long can tomatoes go without water?By using watering systems such as wicks, capillary matting, and hydroculture, you can keep most plants happy for two weeks or even more. The plants that need the least care are those grown in sealed terrariums. They can often go for years without water! a water-filled tray before leaving on a long trip.