Instead of asking about everything I can mulch, I thought it would be easier to ask what not to mulch. I guess I am just trying to gauge the usage of mulch. I used some mulch in a pot of peppers, but later found out it was a bad idea. I also know adding mulch to say, Lavender or Rosemary would be bad since they like it dry.
Generally, what are the dos and don'ts? Could I basically mulch most veggies and herbs in ground? How about pots? Reason I found the usage of mulch was bad in the pot with my pepper is that the soil was about half clay.
I live where water is plentiful, but I mulch absolutely everything. There's no better way to keep moisture in the soil to sustain your plants and to create an environment in which worms, fungi and other soil organisms will flourish. To this day, I haven't had any pest issues (like mice) living in the mulch, or any problems with mulch being too close to the plant stem or tree trunk. It's remarkable to see how different soil is underneath a thick mulch as compared to bare ground.
Around my vegetables and fruit I use straw and also use straw to cover the veggie beds for winter. I use pine bark mulch around my perennials and to cover the flower beds in winter.