Daffodils are split into 13 divisions. Spellbinder is in Division 1, Trumpet daffodils and flowers early to mid-spring. The cup (corona) is described as a trumpet and is as long or longer than the petals (perianth) segments. The flowers are greenish yellow and the trumpet gradually fades to white with whitish green at the mouth.
Borders, Under deciduous trees, In front of shrubs, Mass plantings
Plant bulbs in the fall in well-drained moderately fertile soil that is kept moist during the growing season. After flowering, remove spent blossoms but keep leaves until they yellow. Apply a low nitrogen, high potash fertilizer after flowering if bulbs are not blooming well. Daffodil can naturalize (spread).