Giant duckweed - Spirodella polyrhyza

andusbeckus

Member
Joined
16 Dec 2016
Messages
150
Location
South Yorkshire
I’m looking for a floating plant and came across a large version but can’t find any for sale?
Has anyone had any or have any more info on it?
 

andusbeckus

Member
Joined
16 Dec 2016
Messages
150
Location
South Yorkshire
Hi all, It likes hard water with high conductivity and nutrients. I might still have a little left, but I don't have any suitable tanks for it.

cheers Darrel
Where did you get it from originally? It’s strange I can’t find any at all online in the uk.
 

dw1305

Expert
Joined
7 Apr 2008
Messages
10,438
Location
nr Bath
Hi all,
Where did you get it from originally?
PYO unfortunately. They were plants that I picked up when I was on field work. I'll see if I can perk up the bit I've still got.

It came from one of the <"ponds in Bristol">, which I surveyed in the summer. The last place I saw it before that was at the <"Steart Marshes project">. It was really common there in some of the rhynes, which are freshwater but high conductivity and nutrient status. It isn't a very common plant.

cheers Darrel
 

mort

Member
Joined
15 Nov 2015
Messages
1,186
Is this the only species with the red underside here in the uk? If it is we have it here in the broads. I had some in my pond but it dissappeared after growing strongly for a short while.

If you can't get any then bump this when the weather warms up and I'll see if I can find some for you.
 

Parablennius

Member
Joined
5 Mar 2016
Messages
169
Location
LANCS
I keep Frogbit and Ceratopteris as floaters and I've found that when they get too dense they actually "retain" surface bio-film. Normally my surface water skims off over a weir into the filter but dense growth can prevent this. HTH.
Cheers
 
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