This is a predicate adjective, as it immediately follows a copulative (=linking) verb "to grow". If it said - The tall grass, then "tall" would be nominative. This way it isn't, it is a predicative adjective.
<span>The best way to read Shakespeare is out loud. You cannot just curl up in your chair and read. The plays were meant to be performed! An audio version that is word for word is really the best way to enjoy the full experience, short of a stage presentation.</span>
The EPA is the organization I don't know exactly what the scientists are called though. Hope I helped in some way.
Theme is the correct answer