What is wrong with this Abelia?

Question

I have three Abelias in my backyard. Two of them are doing quite famously, but one seems to be languishing a bit.

– All three are on the same sprinkler system and receive the same amount of water.
– One of the two flourishing plants gets the same amount of sunlight (all day until late afternoon).

I’ve attached photos, one shows the plant I’m concerned with and the other shows its companion get gets the same amount of sun.

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Answer 1

For some reason that escapes me, the photo of the Abelia which is failing to flourish did not post.