Shasta daisy usually grows 6 to 12 inches taller than oxeye daisy and has larger flower heads. Seeds have 8 to 10 white ridges down the side. Oxeye daisy flowers in June through August. Reproduction occurs primarily through seed dispersal and germination, although spreading rootstalks contribute to its propagation. Seeds may be viable ten days after the flower blossoms and are dispersed close to the parent plant.
Germination occurs throughout the growing season, but most new seedlings emerge in spring.
Seeds that do not germinate in the spring may remain viable for many years. One study found 82 percent of seeds were viable after 6 years and 1 percent were still viable after 39 years. History and Distribution Oxeye daisy was introduced to the United States from Europe as a contaminant in seed and as an ornamental. It quickly escaped cultivation and has since become a common weed. Common names include white daisy, field daisy, marguerite, poorland flower and moon-penny.