Horizon Orange Sweet Bell Pepper Seeds from True Leaf Market are non-GMO and heirloom seeds. Horizon orange bell pepper seeds grow into 24"- to 36"-tall plants that produce thick-walled 4" orange bell peppers with a sweet, mild flavor. A must-have for fresh-market growers and home gardeners alike. Mountain Valley Seed Co. heirloom bell pepper seeds are premium quality garden vegetable seeds produced by a small, independently operated seed company. 75 days to maturity.