Please check the attached picture of topiary (maybe holly). We think this may be caused by the heavy rains...the pots are large and have no drainage holes. There are spots on the leaves and overall they don't look good.
The picture wasn't very clear, but it appears to be a boxwood. I also think the problem lies with the container having no drainage hole. It doesn't matter how large the pot is, if it gets natural rainfall, it is swimming. And we have had a lot of rain lately. Try to drill some holes in the pot and see if it doesn't improve. I wouldn't expect much change this winter—the damaged leaves won't re-green, but hopefully further damage can be avoided. I bet if you tilt the pot on its side water will pour out.