Originally Posted by Momotaro
The leaves of Echinodorus angustifolius, when grown submersed, can reach heights of about 24".
I have read that it can get 2 ft or more, but that was never my experience with the plant. It was a very slow grower until all of a sudden it would just took off and had several daughter plants. But the height never surpassed my sag (which I could grow 2+ ft long in the same tank). As usual, mileage may vary depending on your setup.