I think
@sissy is off taking care of some serious family situations right now.
@MoonShadows I remember whoever wintered them said they need plenty of light and I assume warmth.
I found these posts online and sounds like good rich composty dirt might be the answer:
pondmaninal(7b)
Another member of this forum planted hers in dirt and stored them in the basement under grow lights. I think they survived as she had some this year. She is in Missouri.
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frankielynnsie(7B)
I have wintered mine over for the last 17 yrs. I pick off 4 or 5 babies, and 5 other delicate plants in pots and put them in the sunroom on top of a table in a clear plastic tub that is about 6 inches deep, 2 1/2 ft x 1 1/2 ft or so size. Fill with water and top off during the winter. They are tiny when spring comes but grow like crazy when put back into the pond-every year they take over the pond and many have to go to 'the pile'. The tub is crammed with plants and roots and last year somehow there was a little goldfish in there come spring. I didn't know he was there so he never got fed or anything. It doesn't cost anything to try it.
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meyermike_1micha(5)
Ps..Hi Linda
))
After some research on these plants, I have learned they are like weeds in many parts of the world. Not easy to over winter and cheap enough to buy each spring.
But many have had success planting them a rich composty mix in a container then submerged into water that almost touches the rim of the pot. Sort of the way you would treat indoor bog plants. They require rich nutrients, especially potash to stay healthy. They are nutrient hoggers which explains why many probably fail at keeping them healthy all winter and why they help with keeping your ponds algae clean.
I think I will try one like this in a very bright window this winter now.
Mike
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Here's where I found the info:
http://forums2.gardenweb.com/discussions/1587875/water-hyacinth-overwinter-indoor