Howdy all,
Here is my 2 cents and the way WE have always done it.
We blend, mix, different sawdust together. It is a giant recipe for our Perfect Mix, Hickory, Cherry, Hard Maple and Apple. It is not all the same % and there is OUR recipe just like grandmas cookies... we found what we think is a "PERFECT MIX" or percentage of those hardwoods with NO oak or alder.
As far as I know, all other manufactures have only made a hickory pellet or an apple pellet or a cherry pellet, then an oak or alder pellet then added a percentage of each type into a bag and call it done. Our other pellets are made the same way as our Perfect Mix, if it is a mix. Like our Apple Mash is a mix of apple mash and hard maple. But our other pellets like hickory and our newer black cherry is just hickory or black cherry.
So a blend really is what ever the manufacturer wants to call it. Or rather what they do not. Remember most manufacturer bags that just say HICKORY or Apple or Pecan or whatever on them are not hickory or the rest but a blend of what is ON the bag and an oak or alder that is not on the bag. Not knocking them. We choose to tell what we put in our bags.
Hope that helps!
Smoke On
Chris