The isolated seeds that are offered here have been grown under nets or inside bags made out of tulle fabric or other similar material. While this does not guarantee 100% that it will not be a cross, the odds are greatly increased compared to the open pollinated selection. One thing this method will not help with is stability. Many of the seeds being offered are new crosses, particularly in the Super Hot collections. I try to note in the description when a seed is a cross and that future grows from that seed may show variations.