This emerald green has turned brown. What should I do to ...
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Ok so definitely take my words with a grain of salt because i dont deal with many landscaping trees but it looks either sunburnt or like it hasnt been watered. Ive noticed with topiarys and other bonsai ive had over the year that those two things are the biggest causes of either leaf drop or the crispiness you see here. I would keep a close eye on it because it can even be fungal but I dont think thats the case here. My best guess because theres not really much information on how you care for it in this post is to definitely make sure it doesnt dry out. My mom did that with her cost o topiary and the foliage died so quick but she didnt realize that as long as the trunk and branches arent crispy and brittle its still alive and not to give up.