We are pleased to offer a wide range of colors, shapes, and sizes to choose from, including giant zinnias with blooms up to 6" in diameter. Per 1/4 Pound. The “king of summer annuals” California Giant Mix seeds are the largest variety of Zinnias ever, growing 4' tall and bursting with spectacular 5 – 6” semi-double flowers. Sowing: Direct sow in spring; this California Giant zinnia flower seed mix germinates best in warm soil. HOW TO GROW. Giant Cactus Zinnia Seed Mix Zinnia Giant Cactus Mix Zinnia elegans Giant Cactus Mix. Ferry-Morse Ferry-Morse 800 Milligram(s) Zinnia Giant Cactus Mixed Colors Flower Seeds (Seed Packet) Item # 2772259 Model # 461425.158.905912 Get Pricing and Availability 75 - 90 days. Sow Right Seeds California Giant Zinnia Seeds - Full Instructions for Planting, Beautiful to Plant in Your Flower Garden; Non-GMO Heirloom Seeds; Wonderful Gardening Gifts (2) 4.3 out of 5 stars 106 $7.99 Harvest often for continuous blooms. Annual. Our Zinnia varieties are carefully selected for vibrant color, sturdy stems, vigor, yield, quality, disease resistance, and long vase life. As low as $19.95. With a bulk mix of California Giant zinnia seeds, it's possible to see all the colors of this beautiful and meaningful flower. Zinnia elegans. Giant Cactus Zinnias are a highly sought-after variety and this mixture will delight with unique, needle-like petals on large flowers that can reach 4-5" across!