Mica pots have the appearance of high quality unglazed ceramic pots but they are much less expensive. Each of the ingredients in these composite pots contribute to their quality and durability. The Mica has a natural ability to stabilize the temperature of the soil in the pots. This promotes healthy root activity during the growing season and protects during the cold periods. Graphite provides the color and also prevents discoloring. The polyethylene bonds raw materials together and makes the pots tough and durable. Therefore these pots seldom break.