I purchased two 3" diameter root divisions three years ago and this summer the shoots are coming up in this order: approximately 6" away from last year's culm and when they get to about 12" high, then a new shoot appears directly behind it, between it and last year's culm. Piggyback. When I start dividing these next year I don't want a mess because I neglected to DO something about it NOW. The biggest Piggyback shoots are about 3-4" tall at this time. Anyone who has past experience would be of great assistance.