Answer: Dig up the bulbs after the leaves have dried completely. With a sterilized knife, cut two or three shallow notches across the base of each bulb. Then replant the bulbs and let them grow all summer.
In the fall, dig up the bulbs; tiny bulbets will have formed along the notches. Pull off the bulbets and separate them, then plant in a cold frame for a few years, until they are large enough to plant in a flower bed.
Another method is to scoop out a small cavity in the base of the bulb. This should give you few, but larger, bulbets.
Q&A Library Searching Tips