Daffodils are the most cost effective pest-free perennial plants available and make wonderful companions with other bulbs perennials annuals and flowering shrubs. They grow in almost all areas of the United States as long as there is a discernible winter. They are pest-free and when given ample sunlight water and proper nutrition will provide early spring color for many years. They are divided into 13 divisions according to their flower shape and heritage. Daffodils should be planted in full sun or at least 6 hours a day of sunlight after the leaves are on the trees and should be planted 3x the height of their bulb deep (3-8″). The ADS defines DIVISION 4 – DOUBLE as: “One or more flowers to a stem with a doubling of the perianth segments or the corona or both”. Camellia or roselike flowers; with single or multiple blooms; good for shows showy gardens picking and bedding; 4-5 per sq. ft.; whz 4-8 unless otherwise noted; 14/16 cm bulbs. unless otherwise noted.