I recently created an interactive installation that involved procedurally generated plants using the L System SOP (learn more about the project). This video shares some of the tips and tricks I learned, along with a reusable tox component that adds a host of functionality to the L System (see download link below). The tutorial covers rendering leaves separately from the trunk/branches, limiting generations, using instancing for leaves, and customizing the scale and color of those leaf instances. I hope it's helpful for anyone interested in L Systems!
Procedural Plants with L-Systems in TouchDesigner — Tips, Tricks, and Tox For Intermediate