I’m not a huge smallmouth guy by any means but I stumbled into a couple nice ones last week while largie fishing and can’t stop thinking about it. It’s been too long since I’ve got into a bunch of smallies I want to target them specifically. I figure that most guys would point me towards fishing deeper rock structure or points etc. My question is what about the last bits of green grass hanging on? My water temps are mid forties now and will be dropping soon. Is the grass worth a shot or should I just look for that more standard rock structure? Side note, but If I’m looking for the rock what depth would be my best bet? 

smallies are like any othe rpredator- find their food and you will find them.

 

Perch, gobies, and alewifes (what I think your's will be eating) need a bit of cover to feel safe.  Isolated grass with a bit of current (either moving water or wind current) are what won St Clair this past year.

I was going to say just about the same thing. If the forage is using the last green weeds, or ones that don't die off over the winter, you'll find some smallies there, if you can fend off the LM.

In those water temps I've caught many smallies on shallow rock, wood, and weed remnants on warm sunny days. If it's cloudy and cold, I do better out on deeper structure.