Annual digging of tulip bulbs is sometimes referred to in old books on the subject. The only advantage to digging bulbs every year is to separate them according to size to give a more uniform bloom display. This is hardly ever warranted. Daffodils and crocus sometimes become crowded and require division every five to ten years to maintain their vigor. Actually, the jonquil is a kind of daffodil with three or more small, fragrant, yellow flowers on each blooming stem.
Daffodils are the large, trumpet-shaped blooms with only one bloom per stem.
Many hundreds of daffodil cultivars have been selected during the past centuries. Plants bloom from late February for the cyclamen flowered group to as late as early May for the beautiful white poets narcissus. The common yellow daffodil usually blooms in mid to late March. Plant sizes range from 6 to 24 inches, depending on cultivar. Blooms are white, yellow, orange, pink or combinations of these.