[harbicide]

Two weeks ago I used my new upright freezer for the first time on a 14 gallon batch of lager.  I pitched a decanted 3 gallon starter of WL830 (that was grown on a stir plate) at 70F and went to bed.  The next morning the wort was 46F.  I then went out of town for the next 4 days.  When I returned the temp was 50F.  I again left town and when I returned two days ago the temp was still 50F but the gravity had only come down from 1.064 to 1.030.  I have let the temp rise to 58F.  While I was expecting a greater reduction in gravity, would it be advisable to now roust the precipitated yeast either by stirring or by bubbling CO2 up through my bottom dump valve?

[morticaixavier]

I don't think it would hurt anything. since you have a conical, and I assume co2, I would try bubbling the co2 through the dump valve and see what happens. you might want to get a big active starter going to, just in case.

Or perhaps perform a forced/fast ferment test and make sure there is not a problem with the fermentability of the wort.

[duboman]

I would rouse the yeast and raise into the mid 60's for a D-rest, let it finish , rack off the yeast and then proceed to lager it

[harbicide]

Seems to have worked as well as I could expect.  Gravity is now 1.018, so time to lager.