I'm using a recipe that calls for a fair amount of Amarillo hops. I still have some in my freezer along with Cascade and Centennial which are both listed as possible substitutions for Amarillo.
In this recipe, Amarillo is used at 15min, 5 min, flameout and dryhop. Since all these times are primarily used for aroma, does it matter where I substitute?
Also, say I were substituting Nugget for Warrior Hops, which in this recipe is used at 60 min then again at flameout, How would I decide at which stage I use the substitution and which I use the Warrior? Do hop characteristics other than Alpha Acid % matter more later on when adding for aroma, or do they make just as much difference early in the boil when adding for bitterness?