Re: [APD] Are there any plants that absolutely cannot grow in hard water?

[Bill Wells <wwells1 at concentric_net>]

Richard J. Sexton wrote:
> See subject line.
Aldrovanda vesiculosa is not supposed to like hard water.  Utricularia 
spp. are supposed to take a little Ca, but not like really hard water. 
I have only grown Aldrovanda in very soft water (10-30 ppm KH, 0 GH) and 
Utricularia in water with very little Ca.  Next year I may try an 
experiment with giving them more Ca.  As long as all other conditions 
are ideal I expect that both Aldrovanda and Utricularia will be able to 
handle a little more Ca.
As for typical aquatic plants I have found that those native to soft 
water can grow in the "liquid rock" that come out of my tap.  Although, 
they may well show an initial setback due to the initial change in 
conditions.

Later,
Bill


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