I saw lumps and bumps on the sides of the pot so I decided to dump this baby out and see the mess. It's been in this 3 gallon pot for about a year now. Most of the 'potting mix' was big lumps of tree bark that I got off an old tree, two and three inches big. Many air spaces in the pot. There was about three inches of peat on the top, for the feeder roots. The whole thing weighs seven pounds! Had to cut the pot. It's hanging now.