Bonsai Barry

You're watering may be too ambitious. If you're watering it from above and below, you may be forcing all of the air out of the soil. I think you'd be better off watering less frequently and keeping it out of bright direct sunlight. I'm assuming that you're keeping it outside. If not, do so immediately. If you posted photos showing the tree, the pot and the soil, you may get some needed advice.

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Bonsai Barry

"Our talent lies in our choices."