Hop Characteristics Derived from Boiling Times
As you can see, peak AROMA is about 7 minutes after the start of
the boil.
Peak FLAVOR is about 20 minutes into the boil and peak BITTERNESS is arrived at about 60
minutes.
Hops boiled for 20 minutes yeild maximum flavor but all the aroma
has dissipated.
By 40 minutes, all the flavor has disipated.
