I've been asking a friend to save any jugs or strawberry containers she has. I buy a package of strawberries every week so I can have enough for next year. I have two more clamshells that have hardy hibiscus and woodland passion vine on a windowsill. I'm starting to grow more and more flowers from seed, You are so lucky to have a greenhouse. My scarlet flax has kept its leaves all Winter for some reason. I didn't notice it until Winter when everything else was dead, it was one of the few plants that seemed to be evergreen. Maybe I have a different type of flax? I do remember an unknown red flower that looked very similar to the scarlet flax. I bought some Red Hot Poker roots, and I lost 3 out of the 5. Luckily the seedlings will replace the ones I lost. Both of mine are unknown varieties. I'm hoping they do well in my garden.
Here is a picture of my possible scarlet flax