That’s surprising- logically, I figured it would all be relative. Since I used half a pkg. of dry yeast for a 1 gal. kit, I thought it would call for 2.5 pkgs. to do a 5 gal. kit. :lol: [/quote]
There is logic; what you’re missing is that there is a wide difference between “minimum” pitch rate and “optimal” pitch rate.
Go to the calculator flars recommended, it will tell you how much yeast they recommend for 5-gal which is often larger than one pack/vial’s worth. You could have brewed 1gal batches with 0.2 packs yeast but you’d be at the minimum, and dividing a pack in 5 is impractical. Pitching 1/2 pack is something you can do close enough by eye, and get closer to “optimal” pitch rates, which makes “1/2” pack both easier for you and better for the beer.
For 5-gal batches, hitting optimal rates by pitching multiple packs gets expensive. So, your choices are.
- pitch the minimum 1 pack/vial.
- suck it up, and buy 2 packs
- learn to make starters.
If you’re rich enough already; go for option 2.
If you’re using dry yeast, go for 1; maybe it’s cheap enough for 2.
If you’re using liquid yeast, you can get away with option 1 for lower OG beers, but you NEED a starter for higher OG beers. The specific original gravity number where it becomes mandatory is a subject of debate. You’ll hear 1.040-1.070 depending on who you ask. But the calculator will help you get your own opinion. Personally, I think starters are fun, so I just do them.