In hot weather, the tomato bed would require more amount of water. Typically, every 3 to 5 days depending upon how hot the weather is. Also, you need to water deep by watering slowly. Tips on keeping crops cool during hot weather . Regular watering helps prevent tomatoes from developing cracks. So if your daytime high is 95 and nighttime low is 70, the average is 82.5. In dry weather, water in early stage to get plants going. Tomato plant roots can go pretty deep. You may need to water once or twice a day if it’s extremely hot or your soil is sandy. Factors such as weather conditions, soil conditions, and type of plant, play a role in determining the water requirements of tomato plants. At the same time, cherry tomatoes often remain productive in very hot weather that causes the blossoms of larger-fruited varieties to drop off. However, watering them once every 2-3 days during summer is a good idea. ½ to 1 per week if soil is very dry: ... Water when it is dry 2-3 inches down from the top. How often do you water tomatoes in pots? A bush type tomato growing in a 5-gallon container needs water every day, sometimes twice a day during the hot summer months, and when the plant is actively producing tomatoes. Container plants require more water than garden plants, as they heat up the soil and cause water to evaporate faster. The longer the heat lasts, the longer those tomato flowers will continue to hit the pause button. of soil feels dry to the touch. Watering daily can lead to root rot. Make sure that you spread the water around so that it does dilute the nutrients present in the soil. It is important to have the soil moist, not flooded. How often you water tomatoes is a major concern most people face, especially the first time around. Yellow leaves on tomatoes are often a sign of overwatering or they could signal a soil deficiency. Hot climate tomatoes are going to need plenty of water. Avoid Overwatering Tomatoes in Summer Weather Tomato plants need an inch or two of water a week, and a deep soaking is better than a little water every day. Too much water will suffocate plants’ roots. And in hot weather, vegetables need even more water, up to a 1/2 inch extra per week for every 10 degrees that the average temperature is above 60°F. You don't want to spray the foilage too much since tomatoes tend to be susceptible to fungus. The soil needs to be damp at least 6 – 8 inches below the ground to stimulate root growth. Water at the base of the plant. If the weather is hot, over 90 degrees Fahrenheit, then you should water the tomato plants two times a day. Tomatoes grown in containers frequently need extra water. When days hit 85°F to 90°F and nights hover above 75°F, tomato flowers often fail to pollinate, then drop — which in turn puts new fruit production on hold. Water whenever the top 1 inch (2.5 cm.) In short, hot weather can delay your tomato crop. This response helps a tomato plant fight off bacteria, fungi and other diseases. The watering frequency depends upon the size of the container, weather condition, and the type of tomato growing in the pot. How often should tomatoes be watered in hot weather? You can calculate the average temperature by adding the daytime high plus the nighttime low, then dividing by 2. How often to water tomatoes in a raised bed is usually a major source of concern for people who grow tomatoes, especially the first time growers, because tomatoes require a lot of water to thrive. In the current hot breezy weather it is probably best to water in the early evening. This way the plants will be able to search their own water source, and you can water when you feel that the surface soil is getting dry.