Sawdust Usage?

[AlittleSalt]

Our oldest son's father-in-law works with mesquite as a hobby. There's lots of sawdust left over. This comes from old stumps, wedges, etc. (Not boards or treated). My son gathered about 4 or 5 pounds of it and brought to me.

That leaves me with the question, "Now, what am I going to do with it?"

I've read that it compacts easily and that perlite can help break it up some. I'm wondering if it is useful in potting or containers? Of course, there's always the option of throwing it out in the compost bin.

What would you do with this mesquite sawdust?

(If this needs to be moved to the Soilbuilding section - please move it there.)