chinese elm - converting one to full dormancy

Kevin,

word of caution. My elms sleep due to the shortening of days and start to grow when the days begin to grow longer.
My friend in Cannon Falls, kept his in an unheated room, but it never froze.
So a safe temperature might be below 55 deg.F ,but above 40 deg.F.

Normally you test these ideas on expendable root cuttings from Spring, left outdoors for the year.
Best of luck.
Khaimraj