Tomato plants generally need to be watered 2 to 3 times a week during hot summer weather or when there is little natural rainfall, aiming for about 1 to 2 inches of water per week

. The key is to water deeply so the moisture reaches 6 to 8 inches into the soil, encouraging strong root growth, while allowing the top inch or two of soil to dry out between watering to avoid overwatering

. Watering frequency can vary based on factors such as soil type, container versus garden planting, weather conditions, and the plant’s growth stage:

• In-ground plants: Water deeply 2 to 3 times per week, adjusting based on rainfall and heat. During very hot or dry spells, watering may need to increase to every 1 to 2 days

• Container-grown tomatoes: These dry out faster and often require daily watering, sometimes twice a day in extreme heat

• Young seedlings and transplants: Require more frequent watering to keep soil consistently moist, often daily until established

• Mature, fruiting plants: Maintain consistent watering 2 to 3 times a week, reducing water slightly as fruit ripens to prevent cracking and blossom end rot

A practical method to decide when to water is the "finger test": insert your finger 1-2 inches into the soil; if it feels dry, it’s time to water

. Mulching around plants helps retain moisture and reduce watering frequency

. In summary, water your tomato plants deeply about 2 to 3 times per week during warm weather, adjusting frequency based on soil moisture, weather, and plant maturity. In containers or extreme heat, watering daily or even twice daily may be necessary