Resurrected, found it doing a Google search......
.....Now onto chemical root pruning. This thread off of RIU shows Mogie using Griffin's Spin-Out. If you read the thread and look at the pics the stuff really works. A word of caution on chemical root pruining. This study done by, Carl Whitcomb, Ph.D. titled "Improving Containers Copper is Not the Answer"
"Improving Containers Copper is Not the Answer" questions whether or not copper spayed on the inside effects the plants growth. One big idea he proposed was "Mycorrhizal fungi that aid growth of most plants are also killed along with
other beneficial microorganisms" inside copper sprayed pots. This is disturbing considering how much the micro herd is needed to get full lush plants in organic soil growing.
1. That is not Mogie's garden, it is mine. I was the first to use Griffin's Spin-out on cannabis FWIW. Here's my Spin-Out thread which was first published about 6 years ago at the now defunct Overgrow site -
https://www.rollitup.org/general-marijuana-growing/9114-spin-out-chemical-root-pruning.html I still use Griffin's on most everything including edibles like citrus trees in large pots.
2. Dr. Whitcomb is a very knowledgeable man and I have talked to him several times, but by stating "a big idea" about the use of Cu paints he's directing potential customers away from a product that has been used successfully for decades. I doubt if he has ever laid his hands on Cu pruning products like Griffin's much less looked at the myco colony using a microscope after a plant was in a Cu painted pot and root tip pruned by the Cu ions over a period of time. I doubt seriously if the Cu kills anything as the ions are located along the side and bottom walls of the pot, not along the root shaft nor found in the potting mix. It's all in the context of how its used and is designed. I'll have to discuss this with him.
Due to their unique design Rootmaker products are the best I've found doing my research and inquiring at other gardening forums. Air pots look good too but are quite expensive -
http://www.growers-inc.com/air-pots.html Except for the fabric type Rootmaker products direct the roots outside of the pot because of the unique structure and pores of the sidewalls. I just received a 18" X 100' roll of Rootbuilder and will custom build my own pots. Rootmaker also makes many excellent products including fabric, plastic injected molded pots, seeding trays, bottoms, etc.
Uncle Ben