Sunflower Seeds SunFill Green is a unique sunflower that highlights the green calyx, the leaves at the base of the flower, rather than the underdeveloped petals that eventually appear. Each bloom growing on a single stalk can be cut when the buds are full, but before the small yellow petals form. This way, the circular, layered leaves of lime green provide an exclusively fun look in vase arrangements and spring bouquets. SunFill green keeps it tidy as a pollen-free bloom.