How much water do tomatoes need?
John Thompson
Updated on January 05, 2026
Garden tomatoes typically require 1-2 inches of water a week. Tomato plants grown in containers need more water than garden tomatoes. Soil in containers heats up faster which leads to more water evaporation. A good rule of thumb for containers is to water until water runs freely from the bottom.
How much water do tomato plants need per day?
Tomato plants need to be watered daily or every other day unless you have had recent rain. The plants need 1-1.5 inches of water per week, but container-grown tomato plants need to be watered twice per day. The best time to water your plants is early in the morning before the sun gets too hot.Can you over water tomatoes?
Too Much WaterWatering your tomato plants properly is the key to tomato success. Too much water and the plants drown—too little could cause blossom end rot, when the tomatoes turn black on the bottoms. Inconsistent watering can also cause blossom end rot, split tomatoes, and stressed plants.
Is a gallon of water a day enough for a tomato plant?
Every tomato you grow needs about three gallons of water. That translates to about 60 gallons of water per week, per 100-square-feet of garden. Tomatoes that don't get enough or that get too much water can experience disease, rot or just end up malformed.Should I water tomatoes every day?
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 Often To Water Tomato Plants-Gardening Advice
How do I know if I am overwatering my tomato plants?
Early signs of overwatering in tomato plants include cracked fruit and blisters or bumps on the lower leaves. If the overwatering continues, the bumps or blisters on the leaves turn corky. Meanwhile, the roots begin to drown, die and rot, which reduces the amount of water the green part of the plant receives.Can tomatoes get too much sun?
Tomato Sunscald: Why Too Much Sun Can Be Hazardous to Your Tomatoes' Health. Tomato sunscald is a problem caused by growing conditions – specifically intense, direct sunlight for extended periods during very hot weather. The excessive sunlight discolors patches on ripening or green tomatoes.When should you stop watering tomato plants?
Monitoring moisture levels in the soil is the best way to determine when to stop watering tomatoes or to give them a drink. The University of Arizona Cooperative Extension recommends checking the soil by digging about 6 inches down with a trowel or probe to check moisture levels in your garden.How long can tomato plants go without water?
Tomato plants can go without water for 36 hours when planted in a container or garden soil. You want to avoid doing this because it causes stress to the plant which affects its growth. You can use a self-watering container or drip-irrigation system to prevent this problem.Should you water tomatoes at night?
You should water your tomatoes during the day (ideally in the early morning) to give your plants plenty of time to dry out. Watering at night can trigger issues in the plant, including susceptibility to tomato fungus, blossom end rot, root loss and reduced fruit production.How often should you water tomatoes in hot weather?
Avoid Overwatering Tomatoes in Summer WeatherTomato plants need an inch or two of water a week, and a deep soaking is better than a little water every day. Regular watering helps prevent tomatoes from developing cracks. Too much water will suffocate plants' roots.