I have a snowball viburnum bush that I planted 4 weeks ago. It’s growing, but the top of the bushes are turning a lighter green.

Question

I do have semi wet soil also. We are using  these bushes as a fence line.

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Answer 1

It's probably due to the wet soil. Is that a permanent situation? It also just could be the color of new growth, which will turn darker green as it matures.

https://www.gardeningknowhow.com/ornamental/shrubs/viburnum/viburnum-shrub.htm