Strawberry Tree - distressed, how to save?
About two weeks ago, one of our strawberry trees has been looking really distressed. Leaves are slowly browning. Many are now brown. Branches still seem okay but are starting to feel like they're becoming less flexible and brittle. Attached a picture I took earlier today.
We planted the tree about 10 months ago. It was purchased in a 24" box along with two others. The two others are doing fine. One is flourishing. Trees have been watered once per week with other plants in our yard. The backyard doesn't get a lot of sunlight and the ground doesn't drain very well. Tree gets admittedly only one to two hours of sunlight each day, but no different from the other trees that are doing fine.
I think it could have been a pest issue. About a week ago, I saw two bugs that looked like they could be aphids or white flies. I sprayed the tree down about a week ago and I haven't seen any since. I've also treated it with Bayer Advanced Protect and Grow this past weekend.
Any ideas what could be affecting the tree?
Is it suffocating?
Anything I could do to bring it back to life?