Watering your urban planter boxes in summer isn't about a rigid schedule, but about understanding your garden's unique needs. The core principle is to water deeply when the top inch or two of soil feels dry to the touch. This often translates to once a day or even twice daily during peak summer heat, especially for smaller boxes, sun-loving plants, or fast-draining soil.
Several key factors dictate frequency:
* Plant Type: Vegetables and annuals are thirstier than drought-tolerant herbs or succulents.
* Container Size & Material: Small boxes and porous materials like terracotta dry out faster than large, plastic, or glazed pots.
* Soil Mix: A quality potting mix with moisture-retaining coco coir or compost needs less frequent watering than plain garden soil.
* Weather: Hot, sunny, or windy days accelerate drying. Be extra vigilant during heatwaves.
Master the technique: Water slowly at the base until you see it run freely from the drainage holes. This ensures the entire root zone is hydrated. Morning is the ideal time, reducing evaporation and preventing fungal diseases. Consider mulching the soil surface to conserve moisture. Always check the soil with your finger first—this simple test is more reliable than any calendar.