63-77 Days to maturity. Tagetes patula. Organic Sparky Marigold Seeds. Non-GMO, annual, Open Pollinated. Sparky Mixture marigold seeds offer one of the most vibrant and inexpensive blooms available to the home gardener. Our Sparky Marigold Mixture is a familiar alternative to the traditional marigold with unique semi-double heads and a reputation for a high germination percentage. ~ 8,500 seeds/oz.