The movement of water through soil, allowing excess moisture to leave the root zone while maintaining adequate water for plant growth.
Plant roots need both water and oxygen to remain healthy. When water drains properly through the soil, roots can access moisture without becoming waterlogged.
Poor drainage occurs when water remains in the soil for extended periods, limiting oxygen around roots and increasing the risk of disease. Excessively fast drainage can also be problematic because water moves through the soil before plants have enough time to absorb it.
The ideal balance allows soil to hold moisture while still providing adequate airflow around roots.
Drainage affects nearly every aspect of plant health, including root development, nutrient uptake, and disease prevention. Understanding drainage helps gardeners select appropriate plants, improve soil conditions, and avoid common problems such as root rot and poor growth.