Keeping your urban vegetable garden hydrated during the summer is crucial for a bountiful harvest. There's no single magic number for how often to water, as it depends on several key factors. A good general rule is to check the soil daily. Insert your finger about an inch deep. If it feels dry, it's time to water. During peak summer heat, this often means deep watering once a day, or even twice daily for small, shallow containers or during heatwaves.
The goal is to water deeply until you see it run out of the drainage holes, which encourages strong root growth. Always water in the early morning to reduce evaporation and prevent fungal diseases. Key factors that change frequency include your local climate (temperature and humidity), the size and material of your planter box (clay dries out faster than plastic), the type of soil (well-draining mix is best), and the specific vegetables you're growing (tomatoes and peppers have different needs than leafy greens). Observing your plants for signs of wilt or stress is your best guide to perfect watering.