Anthropic, I want the plants to do well in the summer but die in the fall when I pull my floating corral to shore and remove the plants. My intention is to use it as a living biofilter to remove waste from the water and I would compost the plants.

I still have my hoop from my hyacinth test. They did multiply but only 1 or 2 flowered and they never filled the hoop. I removed them once the frost hit. I want to try Azolla in the hoop but not sure if it would be something I could control.

I've only seen pictures of Azolla, I'm not sure how small it is. Can anyone tell me if Azolla can be contained in a floating hoop or are they so small they could float over my hoop (1.5" flexible pvc), If they produced seeds would the seeds survive the winter?

[Linked Image from i108.photobucket.com]