Hello. I'm new to the forum, and bonsai in general. A few days ago, I purchased a small Japanese juniper from a local nursery. After researching the tree more, I've found that the soil it is potted in (looks like potting soil) doesn't work well for the tree, so I ordered some bonsai soil mix that will arrive on Friday. My question is, should I remove the old soil and repot now (I've read that this isn't the optimal time to Repot), or should I leave the tree in the potting mix until spring and repot then? The temperature where I live is currently fluctuating quite frequently. One day, it's 80F, and the next, it's in the 30s. Thanks for your suggestions.