Depends on whether or not the OP were isolated or not. OP does NOT mean non-isolated, but OP can be isolated OR non-isolated, confused yet? In horticultural speak, OP generally means non-hybrid in terms of parent plants. For example heirlooms are all OP, but you should isolate them in order to mantain purity of traits. Not all OP are heirlooms. Are you even more confused? There are MANY people who misuse the term "Open-Pollinated" on this forum, and everytime I mention this common definition I get yelled at and called names, boohoo. Yes, It is up to the individual whether or not they want to misuse it, and it has been misused so much, that it is probably too late to try and clear things up or use it right. Anyway.