I would like to propose to use style definitions instead of styling attributes on every object in TikZ.
This would make the exported LaTex files a lot more clean and readable.
To do so, you need to define a style in the params of the tikzpicture like this:
\begin{tikzpicture}[yscale=-1,
plantClass/.style={This is where the style attributes come to },
plantPackage/.style={ This is where the style attributes come to },
plantLabel/.style={ This is where the style attributes come to}]
The style attributes are the same as the now at the objects directly used.
The object just get the style name as attribute like the following:
\draw[plantPackage] (30pt,32pt) rectangle (481pt,341pt);