- Type:
- Bulb
- USDA hardiness zones:
- 3-8
Split-corona daffodil (Division XI). By definition, a split-corona daffodil features a cup (corona) that is split for more that 1/2 of its length. Flowers are usually solitary. Split-corona daffodils are sometimes further divided into two classes: collar types (Division XIA) and butterfly types (Division XIB). ëColorama is a collar type that produces flowers atop stems that rise 14-16î tall in midseason (April in St. Louis). Each flower features brilliant yellow petals (perianth segments) and a deeply split orange cup (corona) in two whorls of three. Narrow, strap-shaped, green leaves in clumps. J. Gerritsen & Son, 1973.
- Full sun to part shade
- Medium
- Low
Easily grown in average, medium moisture, well-drained soils in full sun to part shade. Good soil drainage is essential. Best in organically rich loams. Soils should be kept uniformly moist during the growing season. Plant bulbs in early to mid fall. Planting depth depends upon bulb size. In St. Louis, each bulb should be planted 2 to 3 times as deep as the bulb, with at least 3î of soil over the top. Space bulbs from 4-10î apart (larger bulbs are planted further apart than smaller ones). Larger spacing may look sparse in early years, but the spaces will fill in over time and division will be needed less. In general, most bulbs will be planted 3-6\ deep and 4-8î apart. After the flowers have bloomed in spring, the top portion of each flower stem may be removed, as practicable, to prevent seed formation, but foliage should not be cut back until it begins to yellow. Flowers usually face the sun, so bulbs should be grown with any shade areas at the rear of the planting. Bulbs can be left undisturbed for a number of years. If bloom quality and quantity decline over time, clumps may be divided by digging just after the foliage dies back."
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