do u mean topped as in cut to make more top colas? thats one of the things i was wondering if blueberry yields more as a single large cola w. several aux colas or to top and make more...i grew last season in Massachusetts, outdoors, with 3 organic white rhinos and got very good results (1lbs from 3 plants). they were bout 6 feet tall w. about 4-6 top colas and trained to about 4 feet. by the way thanks for the info...