Amorphs rebuild a new tuber each year from scratch. The longer the plant is leafed out and getting proper nutrients the larger the tuber will get and the sooner it will bloom. If you can re-pot it without disturbing the roots and stripping off root hairs, then it won't miss a beat. A good rule of thumb is to use a pot 3 times the tuber diameter for medium size tubers. Maybe Cameron can help out here. How long is the growing season before they go dormant?
BTW you have a nice light petiole clone of A. konjac.
