Originally Posted by B33F
Why do ales like the 90 min IPA from dogfish use continuous hop additions? Any advantage to that over early +late adds?
Well, Dogfish Head does some strange things.
I believe that they are trying to extract every nuance possible out of hops, which is why they are doing basically non-stop additions on their xx-minute IPAs.
Early and late hop additions do different things. Early additions impart the bitterness or astringency you can feel on your tongue. Later additions let those aromas that you smell when you rub the hops in your hands stay in the beer. Those aromas are driven off when you boil the hops longer than about 20 minutes.
All that being said, most homebrewers would be reluctant to use the amount of hops it would take to do a continuous addition like DFH does in those IPAs.