Brewed a 10 gallon batch of a saison wort at a super-dry mash temp (142-145 F). It's currently split between two conical fermenters, one of which has around 150 oz of a tart cherry puree. Rehydrated around 30 grams of yeast with 100 F water + wine yeast nutrient. It foamed during rehydration, so it appeared to be alive. Pitched half into each fermenter. The fermenter with cherries bubbled a bit the next day and then stopped. The fermenter without cherries has yet to bubble at all and it has been 3 days (by bubbling, I mean the blow-out tube doesn't appear to contain any significant positive pressure).
We've never lost a batch due to infection, but this is our first time attempting with a wine yeast. How long until we should give up and toss in a French Saison Wyeast? Thanks for any insight!
Update: Thanks Philippe and barking.pete, you both were right on the nose! The OG was measured at around 1.045. Now (3-4 days later) it is down to 1.012 in the fermenter without cherries. I've never seen a completely silent fermentation before, but now I know to rely on SG more than apparent activity! Now, let's just hope it squeezes out several more points...