Good stuff, glad I found this thread... I live on Vancouver Island zone 8a-b in Courtenay... I've been germinating seedlings and letting the surplus face the winter in an unheated greenhouse. In 3 years I've amassed quite a collection by germinating seeds from store-bought fruit, but only so much that can fit into a small truck, and the majority are in these red plastic cups. I managed to isolate a handful of survivors, with the best performing survivor a texas red grapefruit seedling.
What we look for are leaf retention and recovery rate, and the grapefruit had both qualities. I had a Meyer lemon survivor with no leaf retention but with a successful recovery however, only a fair one, as the growing season is ending. More than likely a second winter will be needed to see the long-term success rate, which I can see is dubious in some first winter survivors, so these ones will be kept in an unheated garage over the winter to keep their genetics going a bit for further stress testing.
Definitely don't waste these seeds, you never know what you get since citrus is so diverse.
