Posted: 09/10/2015 at 17:30
There is a theory that plants do better in see through pots. The roots of most plants are photosensitive and shun the light. So in a transparent pot, the roots avoid the outside of the pot so you do not get the problem of roots going round and round the outside of the compost.
No idea if it works though as I have no pots like that to experiment with.