Many people like to form a little dam around the circumference of the hole where a tree or shrub has been planted. The ridge of water is meant to hold the water in close proximity to the trunk of the plant so that it will seep into the ground and into the root ball. Generally these basins are fill by hand watering with a hose and extension tube.

In recent years, this method has been superseded somewhat by plastic bags that can be attached around the trunk to automatically release water into the root zone.

Note: We have provided some general information and observations on this topic aimed at the home gardener. Before you take any serious action in your landscape, check with your state's land grant university's Cooperative Extension Service for the most current, appropriate, localized recommendations.

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