I made the Morebeer Pliney the Elder clone yesterday and pitched 1 US-05 packet without hydrating. I just ran a couple of yeast calculators and it looks like I need more cells. Is it too late to pitch another packet?
No it isn't to late. Rehydrate this one in 80° F water. Add to water, let it rest 15 minutes, stir in and let rest for 15 minutes, Pour into fermentor.
Ok. I went ahead and boiled 2 cups of water, chilled to 80f and pitched, stirred after 15mins, waited another 15mins then added the slurry to the carboy. Hopefully it works out.