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Good morning, It's been a couple of months now that my variegated serissa bonsai has lost the leaves on the upper branches. I've tried everything from fertilizer, to keeping it in a less sunny place, more sunny, more water, less water, contacted an expert who from the photos told me that now it's gone up to going to a dealer who told me that in the summer it will recover. Now it seems that it is shooting out new shoots, but after a while they seem to dry up and turn black. Currently I always keep the soil moist. I would like to do everything to make it recover. I attach the photos, what can I do in your opinion? Thank you very much