Height to caliper ratio- ANZI Z60.1
Caliper to rootball ratio- 1 foot of rootball per one inch of caliper
Trunk Taper
Crown- one half or more of the foliage should be on the lower 2/3 of the branches
Branch pattern- 45 to 90 degree angles, don't buy is main leaders are headed back
Vigor- large dark green leaves, smooth bark, white (not dark or dry) roots
Injury- no injured bark or sunburn
Selecting quality stock- shoot and crown defects