My plants form emmersed leaves, while submersed...


Lifetime Members
Lifetime Member
Aug 6, 2008
Hey There,

I have this really wierd problem which manifested itself first on my Eichornia azurea

When i trimm the plants, the plants tend to form emmersed leaves after a few days, and develop new ones, although they have been submersed all the time. Any idea on how this is even possible?

I did not let the azurea reach the top of the tank, i trimmed it way before it hit the surface. The other plant i am having this problem with now is the Limnophila Gigantea.

Nutrient problems? Can i cut the plants head so it will form new submerged leaves?

Tom Barr

Staff member
Jan 23, 2005
If you let it hit the surface for more than a day or two, they can sometimes form the ugly emergent leaf morphology.

I've seen it when they did not do that every so often also. They might get confused:)???
L gigantea also, but it's a rare, temporary thing. It should revert back.
A few plants do this.

It's a fast growing weed that is banned in the USA. That does not mean many hobbyists did not have a grow it a few years ago. I found some in Florida once and killed it. Look like someone who kept ponds tossed a bunch of out in a single spot.

Since it can get a full 35cm across, and can grow 5-20cm a week, it's not that suited, however is a pretty and dramatic plant submersed. Few keep it here and then only a few pond keepers down south in the USA last heard.

But regular water Hyacinth is legal:rolleyes:
More market I guess for that and it's too late to solve anything from banning it.
the same could be said for Hydrilla, but they still banned that one:rolleyes:

Not really consistent are they?

The plant will use a lot of nutrients, particulalry NO3.

Tom Barr