More gardens die from bad watering than from any other single cause. Here is the framework.
The 1-inch rule
Most vegetable gardens need about 1 inch of water per week — from you, the rain, or both. One inch over a 4×8 bed equals roughly 20 gallons.
Deep and rare, not shallow and often
Two deep soaks per week beats daily sprinkles. Deep watering trains roots downward, where soil stays moist longer. Daily shallow watering keeps roots at the surface where they cook in summer.
How to tell when to water
Stick a finger 2 inches into the soil. Dry? Water. Damp? Wait. Skip the calendar — let the soil decide.
Signs of trouble
- Overwatering: yellowing lower leaves, mushy stems, fungal spots, soil smells sour
- Underwatering: leaves wilt during the day but bounce back at night, soil pulls away from pot edges, leaves crisp at the tips
Drip vs. sprinkler vs. hand
- Drip: most efficient, keeps leaves dry, $30 setup
- Soaker hose: cheapest drip alternative
- Sprinklers: convenient but wasteful (40% evaporation) and promote fungal disease
- Hand watering: fine for small gardens, but be honest about consistency
Mulch 2–3 inches deep with straw or shredded leaves to halve your watering needs.