Will these plants survive the winter?

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I'm not sure if my plants will survive my current setup, hoping for feedback. I reconfigured my turtle pond with multiple stock tanks to hold plants and keep them from the turtles, and those tanks have a lot of plants that are in pots filled with gravel or kitty litter/gravel. About 3/4 of each pot is submerged, the rest is exposed to the elements. Will those plants make it through the winter with the plant crowns exposed like that? Each tank will be covered with greenhouse plastic on a pvc hoop frame, so temps will be a bit warmer than the outside air. My lows will get down to around 25F, but much of the winter, it will be in the 30s at night . should the plant crowns be submerged? And what about the water itself? if it gets icy on top, will that wipe out the plants? The pump will continue to circulate water in the winter.

Plants include Canna, plantain, taro, society garlic, water celery, curly leaf juncus rush, parrot's feather, creeping jenny, calla lily and a few others. Of these, the first 4 I've overwintered just fine outdoors, but in dirt, in a gravel bog. This time round, there is water surrounding the pots, no gravel, and the plants are not in dirt, at all.

The setup includes a 3' deep pond, water is pumped out into a series of above ground stock tanks, with gravity flow between them, then back into the pond. Images of a couple of the tanks. Tanks have rocks on the bottom, with plants on top.
short tank.jpg
trash can.jpg
 
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My creeping Jenny freezes completely every winter (and we get a lot colder than you, here in Massachusetts) and grows back great. Some of it is in the waterfall I leave running, some in a gravel bog that gets drained over the winter. It does not care.

I think the cannas need to at least go dormant when it gets cold, they won't stay green year round. If it's not cold enough to kill them, it's probably beneficial.

Can't really speak to the others, hopefully someone else can.
 
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Thanks. It sounds like some of my plants will be okay. I guess I will just see what happens and then I'll know.
 

addy1

water gardener / gold fish and shubunkins
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My planting plan land and pond, plant, if you make it you get to live here, die over winter, sorry. Not replaced. I don't baby plants.
 

j.w

I Love my Goldies
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My planting plan land and pond, plant, if you make it you get to live here, die over winter, sorry. Not replaced. I don't baby plants.
Me too, they gotta be strong enough to survive our winters or bye bye!

Only my 3 Amigos, actually it had a baby and now it's a 4 Amigo plant in a big pot gets rolled into my garage in winter. Easy, as pot is right by garage door.
4 Amigo's 2 2025.JPG
 

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