RootMaker containers specialize in the growth of a fibrous root system. Johnson’s Nursery uses them in the production of Wisconsin native trees, shrubs, and conifers.
They are different than the typical, solid-wall container in a few ways. They prevent stem-girdling roots, a condition that may arise from growing a plant without considering the shape of the root system at installation. RootMaker pots overcome this by having multiple ridges and air holes on the sides of the pot walls and base.
The design has small holes that allow roots to push outside of the container instead of growing around the inside of the pot. This physical diameter restriction causes root tips to dry out and prune off. The plant then sends energy back into its roots, creating a more fibrous root system. This root-pruning action is the main design benefit of the RootMaker pot. It’s why we like using it to grow certain plants like small trees.