You'll be fine, this is rotala green you're talking about, right fishboy?
The "regular" rotalas such as green, colorata, indica and others that look like these (just diff color or something) grow fast and easy. Hard plant to kill. I have had some that grow out of the soil because I uprooted/cut all of my rotala sp. green and they somehow had a stem under the substrate still or I must have missed a TINY portion. It regrew back into my tank and I kinda just left it there now. Like I said though, hard to kill. :-P Good thing they're nice.