Name: Rick Corey Everett WA 98204 (Zone 8a) Sunset Zone 5. Koppen Csb. Eco 2f
Some people use "OP" to mean a batch of seeds that were produced by letting them cross-pollinate freely with unspecified other nearby plants. I like Joseph's term for that: "Promiscuous Pollination".
I prefer the way you're using it: a strain that has been inbred enough to "come true" when pollinated with pollen from the same variety of plants.
