that a massive amount of honey for a 1 gallon batch. the gravity might be so high the yeast cannot rehydrate.
meads with this high a honey quantity usually start with no more than 3.5lbs of honey, and the rest is 'fed' into the fermenting mead at weekly intervals.
Primary: English Mild
On tap: Pale Ale, Lancelot's Wheat, English Brown Ale, Steam Beer, HoovNuts IPA
Bottled: MOAM, Braggot, Raspberry Melomel, Merlot, Apfelwein, Pyment, Sweet mead, Cabernet
Gal in 2009: 27, Gal in 2010: 34, Gal in 2011: 13, Gal in 2012: 10