This collection is for the seeds we have available that are grown in the open and not isolated. These seeds are not protected against accidental cross pollination. These seeds cannot be guaranteed for 100% purity. I have shared many seeds open pollinated over the years and grown many out myself. I have results from grow outs of non isolated seeds over the years and they grew true about 75 to 80% of the time. For this reason these seeds will always be cheaper than the isolated seeds.