Using a drip irrigation system, how much water is required per tomato plant per day and/or per week?
Watering Tomato Plants
Certified GKH Gardening Expert
The rule of thumb is 2" per week. Since you are on a drip system, I would recommend taking one of the lines out of the ground and measuring how long it takes to fill a small cup to 2". That will determine how long to run the drip system for proper watering.