Bulbs can yield several plants if divided in an appropriate way. Scaly
bulbs such as lilies and fritillary are propagated by scaling whereby the outer scales are pulled off and put in a polythene bag with a
suitable moist material such as vermiculite or pushed to half their depth
in open propagating compost and covered with polythene. For tunicate bulbs, such as tulips, the daughter bulbs within the parent
bulb can be removed in late summer and grown on in open compost in
a warm environment. Bulbs with a tight structure, such as hyacinths and
daffodils, are cut into pairs of scales, twin scaling. The outer scales are
removed and the remaining bulb is cut vertically into several segments.
These are then split with a clean knife into pairs of scales with a piece
of the base plate and treated as scales. Chipping is used with non-scaly
bulbs whereby the bulb is simply divided vertically into many pieces,
each with a piece of basal plate. For these methods it is important to
maintain hygienic conditions and use a suitable fungicide to minimize
the introduction of fungal diseases to the cut surfaces.