Is it not the leafminer activity?
Forgive me, I don't really know what leafminer damage entails.
Maybe a while tree shot as well?
Sorce
That section seems to have been growing for a while longer though?
In my studies of Boxwood I have noted very preprogrammed growth mechanisms.
They certainly don't want to grow outside of their regular scheduled spring and fall spurts.
It looks as if this one was pruned a little hard a little late, which is why that part was still growing through what normally would be summer Dormancy. That bit of "confusion", that led it to grow through the hotter times, could be why it is "off".
Note the preprogrammed lengths they will grow to as well. By pruning before growth in Spring and fall, we can safely shape them exactly.
Sorce
i actually became fond of boxwood thanks to that thread.
That’s as interesting as it is potentially troubling... i’ve never seen this before.
I hope you get it figured out..
I’ll bump you back to the top and call some others (who aren’t already here) to the party.
@Leo in N E Illinois , @penumbra , @leatherback , @Forsoothe! , @Wires_Guy_wires , any ideas about “what’s up” with these buxus leaves?
Thx for linking me in. I had seen the thread before, and nothing to bring to the table. I have a strong dislike for the species, and gave 2 massive ones away at abonsai BBQ party a few years back.
To be more helpfull.. I would keep an eye on the leaves and not worry. See what spring brings. Could be as simple as a deficiency, or as bad as some blight. But .. Not knowing and just slinging all sorts of treatments at it, that would not be my route. Does not look like anything severely urgent to me. The leaves for the rest seem happy enough..