Answer: Sounds like a chamelleon landscape! Japanese maple will lose their purplish tint in the south at times. Shady conditions will result in less color, and I've notice new growth during the heat of summer may be a bit on the green side. By fall it should look better. If the shade is too dense, you might consider removing a few limbs from taller trees to brighten it a bit without exposing the maples to the direct sun. Our southern sun can cook them!
Golden euonymus will exhibit a turn toward green/chartreuse on vigorous, new growth. If the leaves are fully green (no lighter or yellow varigation) you have a plant that is reverting back to the dominant form. Simply prune out green shoots where they attach to a normal (variegated) one.
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