I've just started to become passionate about Bonsai and have taken just about every natural tree I have on my property and cut at least one example down to size! I happened to be at the store the other day and found a rather inexpensive and healthy blue rug juniper and decided to buy it to try my hand at a potted bonsai. My question is, since I don't have any potting material at the moment, but am eager to start shaping the tree, can I leave the tree in the pot it has come in from the store for a while? It is certainly a large enough pot and I will be transplanting it soon but I just spent all of my gardening budget on perennials for my garden and can't afford mix and a nice pot (which I would like to use) at the moment. Thanks for your reply. Appreciated.