Magic Pots are made of a chemically inert, porous fabric that allows air and water to pass through the roots without drowning them. This allows roots to grow without circling (girdling) and choking the plant so your plant can grow larger in its pot without repotting. Instead, when the roots reach the container wall, they send out new roots, resulting in a healthier root structure.
Plastic containers don’t allow the water to evaporate as easily as Magic Pots, so it’s easy to overwater, causing the roots to rot.
Magic Pots can withstand frost without cracking, so if your plant can withstand a frost, so can your Magic Pot.
After years of growing and paying 1000’s of dollars in containers and knowing i could do better for cheaper this is the end result, Magicgrowing.com