I've been using the mother plant in the photo below for macropropagation for about 8 years. I prefer using small mother plants because they produce small plantlets and everything can be done in 1 gallon pots. First step is to plant and root the old mother plant. Second step is to move the growing point of the mother plant above the soil level. Third step is to cut the rhizome at soil level leaving the lower part of the rhizome in the pot to produce new offshoots. Forth step is to start again and repeat the First step.