verwatering

Overwatering, or verwatering, is the condition in which soil or growing medium remains saturated with water for extended periods, reducing the air-filled pore space available to plant roots. Prolonged waterlogged conditions can suffocate roots, impede nutrient uptake, and raise the risk of root rot and fungal diseases.

Causes include incorrect irrigation practices, excessive rainfall, poorly draining soil, compacted or heavy soils, and containers without adequate drainage holes. In pots, watering on a fixed schedule without checking moisture, or using a soil mix that drains poorly, are common factors. In garden settings, high rainfall plus clayey or poorly structured soil can create chronic saturation.

Signs of verwatering include soil that stays wet days after watering, yellowing or drooping leaves despite moisture, limp stems, and slow or stunted growth. In severe cases, roots may become mushy and emit a foul odor, and mold or mildew can appear on the soil surface.

Prevention centers on improving drainage and monitoring moisture. Use a well-draining soil mix, ensure pots have drainage holes, and water deeply but infrequently, allowing the top layer to dry somewhat between waterings. Check moisture with a finger test or a soil gauge, and adjust watering to weather conditions and plant type. Mulch can help regulate soil moisture in some cases, but avoid keeping the surface continually saturated.

Treatment involves removing standing water, inspecting and trimming rotten roots, and repotting into fresh, well-draining mix if root rot is present. Improve drainage and aeration in the growing medium, and reduce irrigation during wet periods to prevent recurrence.