not a kingsville boxwood but i have buxus harlandii, and they can be fussy with repotting, take to much of or bareroot and they will drop the lot, some times branches, definately leaves.
im not sure on repot time sorry, i know that they dont like it during summer thats for sure. i am still learning with this species, bit of trial and error. you should find some info at bonsai4me.com
wheres the pics?
jamie

SHOHIN YAKUZA!!!

taking the top half of trees of since 2005!

and growing trees for the future generations! 50+ year plans
