I used to work with mule deer habitat out of Elko, Nevada. I enjoy that part of the world!!
Is there much sun reaching the soil under the fir trees? All forage crops require sunshine. If the amount of sun is limited, you might terminate the ferns and Green Cover Seeds Clover Release. It does better in a partially shaded area than most forage crops. Clover requires ample moisture to be productive – especially when it germinates.