- You Will Get 320 Seeds Of Sneezeweed, Helen's Flower, Yellow Flower Sneeze Weed Flower Seeds. - Perennial. - Yellow. - Grows up to 4' tall. - Sun or part shade. - Hardy zones 3 to 8. - Produces multiple yellow daisy-like flowers. - Called sneezeweed because the indians used to crush dried leaves to make them sneeze and drive away bad spirits. - Blooms in July, August, and September.