vegetable gardens recommends watering when soil is dry about 2 inches below the surface, and applying water slowly enough that it soaks in without puddling or running off.
Sandy soil dries out faster and may need attention more often than heavy clay, and a container plant dries out much faster than an in-ground bed.
UMN Extension’s summer squash growing guide puts the general target at roughly 1 inch of water per week for vine crops, but that figure is a starting point, not a rule.
Rainfall, soil type, drainage, wind,
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