From PlantHaven Spring Trials 2013: Cosmos 'Dark Secret' has elegant deep chocolate burgundy blooms with a light chocolate fragrance. 'Spellbound' has unique deep crimson, rounded, tulip-shaped blooms with a strong chocolate fragrance. Both were bred for increased vigor and are perfect for containers, borders and mass landscape plantings. USDA Zone 9. Finish Time: 6-8weeks (QT) 10-12 weeks (GAL).