Water is essential for plant growth, but overwatering kills more garden plants than drought. Here is how to get it right.
How Much Water Do Vegetables Need?
Most vegetables need about 1 inch of water per week, either from rain or irrigation. During heat waves, this can double. Use a rain gauge to track what nature provides.
When to Water
Water early in the morning. This allows foliage to dry during the day, reducing the risk of fungal disease. Evening watering leaves moisture on leaves overnight, encouraging mildew and rot.
Deep vs. Shallow Watering
Water deeply and infrequently rather than shallow and often. Deep watering encourages roots to grow down into the soil, making plants more drought-tolerant. Shallow watering keeps roots near the surface where they are vulnerable to heat and drying.
Drip Irrigation
Drip systems deliver water directly to the root zone, minimizing evaporation and keeping foliage dry. They are the most efficient way to water a vegetable garden and can reduce water use by 30-50% compared to overhead sprinklers.
Signs of Overwatering
Yellowing leaves, soggy soil, wilting despite wet soil, and mold at the base of plants are all signs you are watering too much. Let the top inch of soil dry out before watering again.
Mulch Is Your Best Friend
A 2-3 inch layer of organic mulch around plants dramatically reduces evaporation, can cut watering frequency in half, and keeps roots cool in summer heat.