70-85 Days to maturity. Celosia plumosa. Castle Series Plumed Celosia Flower Seeds. Non-GMO, Annual flower. These classic Plumed Celosias are high performers throughout the summer, boasting densely packed and vibrantly colored spires that reach 7-8 inches in height. A great selection for containers, borders, and mass planting. These unique bloomers are just the spark of color your flower bed needs! The plant matures at 12 inches tall. The sophisticated, bright spikes are sure to be the eye-catching centerpiece you are seeking. Approximately 39,000 seeds/oz.