Thanks for the recommendation. I've added Verdant and am liking it so far.
Also:
*Landscape Fixes For Grass Mods.esp
*Complementary Grass Fixes.esp
*NoGrassINCities.esp
... one or another of which probably helped make the roads stop being so ridiculously overgrown in places. I still have "3D Forest Grass" and "Skyrim Flora Overhaul" installed as well. Not really sure how they all interact, but whatever, grass is looking good.