The pots are ideal for growing. I bought it for greenhouse Romberg it. Unfortunately, I realized that the upper diameter of the pots not ideal fits into growing greenhouse (although they are offered extra for it). The pots are all a little shaky and wrong in the greenhouse, because it is too close to the surface. The cover of the greenhouse can be closed, as always survive some edges of pots difficult. I would have liked a little smaller in the upper diameter. Otherwise they are ok, the material is initially fixed and they can be filled well. With increasing humidity, the pots are then softer and thus more flexible. They serve their purpose. I myself breed cacti in biodegradable pots.