Dividing Hardy Bulbs
Hardy bulbs sometimes need to be divided, too. Some daffodils, narcissus, and other bulbs produce offsets or small bulbs produce around the base of the bulb after a number of years in the garden. After foliage dies back, you can dig up the bulbs and carefully separate the offset from the parents to increase your plantings. Replant immediately or store them in a cool, dry place until bulb-planting time in the fall. Plant the offsets twice as deep as their height; don't plant them as deep as mature bulbs. Small offsets will take a few years to reach blooming size.

Some corms, such as gladiolus, crocus, and freesia, produce small structures called cormels around their base. These can be divided the same as bulblets. When plants are dormant, remove the cormels. Replant cormels of hardy plants like crocus and colchicum. For tender plants like gladiolus, store the corms and cormels in a cool, dry place over winter and plant in spring.

For scaly bulbs like lilies, you can dig the bulbs in spring and remove the small scales that form around the outside. Replant immediately.