I am planing to brew NB’s Dry Irish Stout later this week. Didn’t order the WY 1084 because I thought I still had some harvested yeast. The harvested yeast I had was WY 1098. Should have checked before placing the order. Alternate yeast is S04. I had a packet in the frig with an expiration date of February 2014.
I rehydrated the yeast in one cup of 90°F well water. Had a half inch thick krausen ten minutes after sprinkling the yeast on the surface of the water. Few minutes later stirred the creamy mixture and added it to 1400 ml of 1.020 wort. This morning the starter wort is completely fermented out at 68°F.
I may decant and pitch as is or feed the yeast 500 ml of 1.040 wort about 8 hours before pitching into the stouts wort.
Planned fermentation temperature with this yeast is 62° to 64°F to ferment clean.