URBAN PLANTER BOXES

There is no single watering schedule that works for every urban planter box. The best rule is to water when the top 1–2 inches (2.5–5 cm) of soil feel dry. Push your finger into the soil or use a moisture meter. For most established urban planter boxes, that means roughly every 2–3 days in hot summer weather, every 3–7 days in spring and fall, and every 7–14 days or less in winter. Small boxes, shallow boxes, dark containers, windy balconies, and rooftops dry out faster; large boxes with mature plants and mulch hold moisture longer. During heat waves, you may need to water daily or even twice a day for small containers. Newly planted boxes also need more frequent checking. Water deeply and slowly until water runs from the drainage holes, then empty saucers so roots do not sit in water. If the box has no drainage, water more carefully and never let it become soggy. Water in the morning to reduce evaporation and disease. Add mulch to the soil surface, group pots to shade each other, and consider self-watering planters for busy schedules. Watch the plants: wilting, crispy edges, and a light pot mean thirst; yellow leaves, mold, or constantly wet soil mean overwatering. Adjust by checking the soil rather than following a rigid calendar. That is how often you should water plants in an urban planter box: as often as the soil moisture tells you they need it.