Diy Tree Grow Tubes . If you mean a plastic tube to protect the bark of an established young tree (6 to 12ft tall) from buck rub, then drain tile or something. Features of the miracle tube tree tube. Tree Tubes, Tree Protection, Treeshelters, Tree Protectors, Grow Tubes from wilsonforsup.com It holds 10 test tubes,. Tree pro was the 1st in the industry to introduce venting and a rolled top to protect trees from the sharp edge of a tree tube. This decision came after a year long battle against heat issues, our grow room would run around 27/28°c (80/85°f) with spikes up.