I thought I add, I decided the 11 liter smart pot's were not cutting the mustard, I went up to 15 liter. Something went wrong though. 3x15 is 45, but it took me nearly 70 liters of soil to fill em, they barely fit in my grow room, they are MASSIVE. The label says 15 liter, I'll be buggered if thats true though, 25 more like