Tomato plants generally need about 1 to 2 inches of water per week, but the exact frequency depends on their growth stage, soil type, weather, and whether they are in pots, raised beds, or garden beds. Watering Frequency by Growth Stage:

• Seedlings: Keep soil consistently moist with light watering once a day or every other day.
• New Transplants: Water daily for the first week to 10 days to establish roots.
• Established Plants: Water deeply 3 to 4 times per week, providing about 1 to 2 inches of water weekly.
• Fruiting Plants: Maintain the same watering schedule but reduce water volume to prevent fruit issues like blossom end rot and cracking

Watering by Growing Method:

• Potted Tomatoes: Water daily or even twice daily in hot, dry weather, keeping soil moist but not soggy. Mature potted plants may use up to a gallon of water per day.
• Raised Beds: Water deeply for 20 to 30 minutes, 3 to 4 times a week. If beds are shallow, check daily and water more frequently but for shorter periods.
• Garden Beds: Water daily for the first 7-10 days after transplanting, then reduce to 3 to 4 times a week with deep watering sessions lasting 30 minutes to 2 hours depending on conditions

Additional Tips:

• Water at soil level to keep leaves dry and reduce disease risk.
• Water in the morning to allow foliage to dry during the day.
• Use mulch to retain soil moisture and reduce evaporation.
• Check soil moisture by feeling the top 2-3 inches; if dry, it’s time to water.
• Avoid overwatering, which can cause yellowing leaves, root rot, and fruit problems

In hot weather, tomato plants may need watering as often as twice a day, especially in containers. In cooler or rainy conditions, watering frequency can be reduced accordingly

. In summary, water tomato plants daily when young, then transition to watering deeply 3-4 times a week as they mature, adjusting based on weather, soil moisture, and plant needs.