1 - 1.5 oz/gal (3/4%-1.25%) are stout mixes - applied on a spray-to-wet basis. The best mix-rate actually depends on your water-volume (how heavily you apply the product-mixture). With HABITAT, I usually encourage a relatively high % solution applied with low water-volume (vs low % solution with high water-volume). With either method, you get a comparable amount of square-footage in coverage per quart of product - but with differing amounts of water-carrier.
Be sure to include a good MSO or conventional surfactant @ ,25% to .5%.