Plant native wildflowers in the fall - wait for the rains and even the first snow! Scratch up the ground a bit, pat them in (don't bury them!), and watch them pop up in the spring. Depending on how thickly you sow the seeds you can cover a large area with this amount (up to an acre)...it's tough to say exactly, but wildflowers also naturalize over time, so don't sow them too thickly. 
 
Native Seed Plant Mix 2
 
Western Aster, Little Sunflower, Arrowleaf Balsamroot, Tall Cinquefoil, Blanketflower, Lewis Flax “Palouse”, Taper-leaf Penstemon, Silky Lupine, Oregon Sunshine, and Western Yarrow.