i just brewed 5 gals of JZ bohemian pilsner a week ago. i was in a hurry going on a trip with the familiy and forgot to create the starter 2 days in advance as i had planned and only used one activator pack of bobemian lager in a one liter starter on the stirplate for 12 hours.
the OG was 1056, but now week later, at 12°C, it is 1050. i know i seriously underpitched, but i was hoping the brewing gods would work with me for once.
i don't have any bohemian yeast any more. but i have 820 san francisco lager. i also have an english ipa finishing off using nottingham. other yeasts i have are german ale, french saison, us05 and s04
i have several ideas how to salvage this fine pilsner, but i wanted your comment on what route to take.
1) create a 2 liter starter using 820, crank the temp to 15°C, stir up the pilsner, aerate it and pitch the starter.
2) when the english ipa goes in the keg, pour the pilsner on top of the yeast cake and crank the temp to 15-16°C. would end up with saas hopped blond ale
3) use the german ale and go for hopped kolsh