Rocket Pot containers root-prune trees by guiding root tips to open air. RocketPot's open wall and floor permit high oxygen permeation of the growing medium. Very fine root tips thrive and grow in the moist air in the pore spaces until they reach a cusp. They are guided to open air at the cusp end where they lose apical dominance.
Root branching occurs well back within the root ball and several new roots grow to adjoining cusps. The process repeats at an accelerating rate until the growing medium is colonised with fresh new roots. Suddenly, when all of the medium's pore space is filled with roots,root growth slows.
Growth of the head of the tree slows too in equilibrium with its roots system. Plants can be held safely for much longer than other pots. The roots do not spiral and plants look healthy. When the RocketPot is removed and the tree is planted, the abundance of active roots grow outwards and downwards to colonise the new site. The tree grows like a Rocket.