Garden Water Needs Calculator
Weekly Water Needs
Calculate weekly water requirements for your garden
Watering Time Calculator
Calculate how long to water with your hose or sprinkler
Formula
Weekly Gallons = (Inches Needed - Rainfall) × Area (sq ft) × 0.623 | 1 inch of water on 1 sq ft = 0.623 gallons
Frequently Asked Questions
How much water does a vegetable garden need per week?
Most vegetable gardens need 1-1.5 inches of water per week, equivalent to about 60-90 gallons per 100 sq ft. In hot weather (90°F+), this can increase to 2 inches. Deep, infrequent watering encourages strong root growth.
When is the best time to water a garden?
Water early morning (6-10 AM) for best results. Morning watering reduces evaporation and gives foliage time to dry before evening, reducing disease risk. Avoid watering in the heat of midday or late evening.
How do I know if my garden needs water?
Stick your finger 2-3 inches into the soil. If it feels dry at that depth, it is time to water. Wilting in the afternoon heat is normal, but morning wilting indicates water stress. Mulching reduces water needs by 25-50%.
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