So right on the P. quad, Jim. Mine is on the south side of the bamboo stand which is on the south side of Marsh's shop, so it is in the most warm, protected spot it could be. It's survived in that place for nearly 4 years now, so I just got lucky. When I start a new one, my fruit-bearing Possum Purple takes until fall to start blooming and making fruits, then it blooms and fruits in spring and fall for the next few years until trunk rot gets it. Your seedlings probably just didn't get quite a long enough season outdoors, Ursula.
Found another nice 'anticipation' surprise out there just now, seed pods on my Nun's Orchids - those naughty nuns! I'll put a pot of seed starting mix under there and see if I get seedlings. Blc. Anduril 'Krull's Scarlet' is sure taking its time opening.