acadia

I bought a buxus (specific variety unknown, shop owner claimed it was indoor, and it seemed to be doing well) from a florist shop back in February. It had a nice nebari and basic branching, but recent growth growing slanted towards the light. At forty dollars though, I couldn't resist. It would be a good project for a semi-beginner like me. I took it home and pruned it, getting rid of the ridiculously slanted growth. It pushed new growth immediately, and began to fill out nicely.

The past couple months though, that new growth has been dying off. The leaves turn brown at the tips, then the whole branchlet dries up. I've lost a number of branches (or at least the outside half of them ) this way. Also, individual leaves have been dropping (this part I think might just be old leaves running their course).

I've had it in a number of locations, but mostly in a window with indirect light, with supplemental incandescent grow light (but not close enough to burn, I don't believe). Because of how high in the pot it is, I've mostly been watering it from below, which has caused a mineral deposit to appear on the soil. I've decided to flush it out and water from the top from now on, however tedious this may be.

It does have new growth now, that seems to be doing all right, but I really want to know what caused the browning and dieback. Any ideas?

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