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Trees from different container types
These red maples were grown in seven different 15-gallon container types. Note the different shapes of the root balls resulting from the seven different containers. The tops grew identically as they have in many other demonstrations and studies. Roots on the wooden boxes, air root pruned containers, SpinOut™ treated containers, and low profile containers had less circling roots than trees in the standard black plastic containers.
See: research abstract
