Sunflower Seeds - Pro Cut Series50 65 days. Pro Cut Series sunflower seeds grow some of summer's most astonishing, vigorous, and timeless blooms. Pro Cut Series sunflower seeds are hardy outdoor favorites for growing unique, vivid color in either a decorative planter or lining the back of the garden. Pro Cut Series seeds promise radiant, eye catching 3 4 heads bursting in their signature orange, gold, red, sunburst, or mixed. Pro Cut Series sunflowers grow easily from seed and are