Hello! This is my first post here. I will post pictures of my little collection of trees in training (I really don't have any that I can really consider "bonsai" just yet), but first... I wanted to ask a question:

Is there any reason why I shouldn't repot a tree into a glass "pot"? I have drilled a drainage hole, covered it with a screen, put some small pebbles at the bottom, covered that with Hoffman's Bonsai Soil and placed the tree cutting in there... (not that I actually expect this cutting to propagate, per se, it was really an experiment in aesthetics)

Not really. It will get ugly soon, coated with algea ono the inside. But no biological reason.

HI.
When the roots of a tree grow, the outer tip of the root wil die when they come in contact with sunlight. Putting it in a glass pot like this wil eventually be bad for the tree.
That's one thing. The other is when you put a bonsai in the sun for good growth the glass pot will heet up so fast the inner rootball will just boil.

Not good.

For esthetics reason there is not a problem. But for growing the plant wil die eventually.

Gr.