Talk about making a statement in the garden! Mammoth Grey Stripe’s huge blooms, growing to be 12” across, sit atop stems that grow to be 8-12’ tall. These garden giants were developed for seed production and attract a variety of birds to the garden. Mammoth Grey Stripe are extremely fun to watch grow and their large size make them great for scattering throughout the meadow or using as a background screen. This huge variety is also perfect for a child’s first garden. All of the seed we handle at American Meadows is non-GMO, neonicotinoid-free and guaranteed to grow. Annual.