11-07-2012, 12:55 PM
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Many years back I tried this plant, more than once, and my experiences bear out what the experts say, that this is not an easy plant and rarely lasts beyond a year, if that.
Nymphoides aquatica should not have the tubers (the so-called banana structures) buried. But even so, they often rot off after a couple of months, following which the plant's growth stalls. Given the varying comments from aquarists on plant forums, it is clear that this plant will either manage or it won't. Lower temperatures do seem better, it is after all a native plant to North America, not the tropics. And most suggest soft to medium hard water, with pH not much above the low 7's and preferably slightly below 7.