Treeshelter Effect on Root Development of Redwood Trees

"Treeshelters (Tubex® polypropylene tubes, 4 inch diameter, 4 ft tall) inhibited development of redwood tree (Sequoia sempervirens) roots. Unprotected redwood trees without treeshelters gained more root fresh and dry weight. Trees grown in treeshelters produced roots with smaller diameter. These data suggest that the treeshelter environment might temporarily prevent redwood trees from attaining optimal root development and anchorage. Redwood seedlings are not suitable candidates for establishment in treeshelters." [Abstract]