Here's what I posted a few weeks ago:
So, I'm trying out my theory tonight. Using the UVM hop calculator, I've determined my fresh/wet hops are 26% dry matter. The fresh weight is 1213 g, which (if dried), has an equivalent dry weight of 345.6 g. This gives a ration of 3.5:1, which is significantly lower than typical recommendations. I'm planning on brewing an IPA with a ton of late hops (single hop-Columbus). Any thoughts on this? I'll update with my impression of the beer and the bitterness. Might have to brew a pellet version for a comparison.http://www.uvm.edu/extension/extensionapps/engineering/?Page=hopscalc.html
The main thing was trying to determine how much dry material there is, hops are typically ~73% moisture when harvested and dried to ~8.5%. For my Columbus hops I picked, that meant a ratio of ~3.5:1. I ended up using a fairly large charge (14.1 oz. wet ~ 4 oz. dry) late at 10 and 5 minutes, as well as the same as a dry hops. I haven't carbonated it yet, but the sample I took the other day was incredible-I got some grassy, wet flavors but the hoppy/earthy/spicy character also came through tremendously in the aroma and flavor. Malt was simple, 92% pils and 8% Vienna.
Harvest time for hops is August to mid September, so it might be a stretch to find some near you. Gorst Valley hops has some, but you're probably best off trying to find a hop farm near you.