Thu Nov 01, 2012 1:53 pm
Not sure how close together you plan on brewing these two beers, but if you are aging the saison in secondary with the brett L. then plan on at least 2-3 mos before you do anything with it. Sometimes it even takes longer for the brett to become noticeable based on residual sugars and temperature during aging. Which means that the slurry under your saison will not even be available until that point. And yes, you will have a blend of brett and 3724 even if you cold crash the beer first, although I don't think by that time that the saison yeast will really have any strength or viability to do much in another beer.
If it were me, I would probably pitch a new packet of brett into your saison and let that age AND purchase a new packet of Brett for your Orval inspiration. If you split the pack and pitch half into your saison and the other half into a small starter for your Orval, then you will have to be willing to keep that brett alive and healthy to use when you are ready which could be up to 3-4 weeks after the saison secondary pitch providing you are brewing pretty regularly. Just some thoughts....
"A bad man is a good man's job, while a good man is a bad man's teacher."