Out of date White Labs yeast:

[Hop Bomb]

Ive an Irish Ale vial thats use by was May 13.  In mr.malty that gives me a viability rate of 10%.
It says I need 3 vials & 1.5 litre starter (slider set to: larger starter fewer yeast packs)

Has anyone grown a starter with an out of date vial? Ive just got one vial. How would that do in a 2 litre starter? (OG of the planned beer is 1.040)

Thanks.

[Eoin]

Ive an Irish Ale vial thats use by was May 13.  In mr.malty that gives me a viability rate of 10%.
It says I need 3 vials & 1.5 litre starter (slider set to: larger starter fewer yeast packs)

Has anyone grown a starter with an out of date vial? Ive just got one vial. How would that do in a 2 litre starter? (OG of the planned beer is 1.040)

Thanks.

I used the same yeast which was majorly out of date recently, it was out since Feb.
I grew a one gallon starter and used that. I didn't use the calculator, I just grew a big starter.

<edit> I brew to 60l, so a gallon normally covers me, I reckon more yeast is normally better and work on the principal that I will never massively overpitch.

[Ciderhead]

Ive an Irish Ale vial thats use by was May 13.  In mr.malty that gives me a viability rate of 10%.
It says I need 3 vials & 1.5 litre starter (slider set to: larger starter fewer yeast packs)

Has anyone grown a starter with an out of date vial? Ive just got one vial. How would that do in a 2 litre starter? (OG of the planned beer is 1.040)

Thanks.

Done it loads of times, Mr Malty is theoretical,
On the practical I brought an 8 month expired WL back to life just for the hell of it, I didn't use it but tasted the starter and it was fine.
I recommend you chuck into a 1 Litre starter which to be honest is loads for that gravity or if you want to be sure a 2 stage, 1 litre to bring it back to life and 2Litres to get up to speed
With o2 in it you will have no problem

[Partridge9]

+1

If you make a starter you are grand -

Think about it - to make a 2 litre starter you need 1/10th the yeast of a 20litre batch

So if your vial is 10% viable - thats spot on !

[Hop Bomb]

Grand job. Thanks lads.

[Rossa]

Just start it off small and it'll be fine.