Boxwood Side Defoliated

[BrownishGreenThumb]

I'm working on a project where there's a nice long hedge of boxwoods. Inside edge facing the house (they're out by the driveway) is looking ok, relatively full and leafy, as is the top. The other side, which gets decent light, is almost fully defoliated. Anybody have an idea why, and what to do about it?

The defoliation should let light and air in, which should encourage new growth, but... nope.

I'd attach a picture, but I'm not quite smart enough to figure out how with the system here...

Thanks!

Scott

[DoubleDogFarm]

How to post pictures
https://www.helpfulgardener.com/forum/viewtopic.php?t=3724

Take a look at this PDF. Maybe you have boxwood blight.
https://www.ppws.vt.edu/~clinic/alerts/11-04-11_boxwood_blight_alert.pdf

Not sure if could or would only affect the sunny side.

Eric