Answer: Unfortunately, when a tree fails to leaf out it is most likely dead. On a weeping tree, it can be due to graft failure, meaning the area where the decorative top was attached to the sturdy trunk and root has deteriorated so that the connection between the two is inadequate to support the top. Since the trees were slow the year before and now one has died, I would suspect some type of environmental condition. It could be delayed response to drought stress, a root problem such as girdling roots that never grew beyond the original planting hole, or possibly an incompatibility between the grafted varieties. I'm sorry about your tree.
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