75-90 days. Zinnia elegans. Non-GMO. The "king of summer annuals" California Giant Mix seeds are the largest variety of Zinnias ever, growing 4 feet tall and bursting with spectacular 5-6" semi-double flowers. California Giant Zinnia Mix flower seeds grow to provide long-lasting brilliance to your garden with an explosion of rose, gold, red, pink, canary, coral, orange, and scarlet. California Giant Mix zinnia flower seeds are a summertime tradition that have been selectively bred for their magnificence and will have you planting again every spring! ~3,900 seeds/oz.