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