Prepare the Bulbs for Dissection
Trim away the top growth and roots, but not the basal plate which is the flattened part at the bottom of the bulb where the roots develop. Peel off the tunic, or outer sheath, of the bulbs like the skin of an onion. Remove any dead parts of the bulb by removing the outermost scale until the bulb is clean and white. Then cut off the top one-third of the bulb. Wipe off any remaining soil and other debris from the bulbs. Allow them to dry for two to three days.