“Would you mind popping over, watering the flowers and making sure there’s food for the cat?” is what most people ask their neighbour before they go away. Amongst hipster foodie circles, I’m aware that it’s not unheard of for it not to be a cat that needs feeding, but actually a batch of sourdough or kefir.
However, living on a winery in the run-up to harvest, I’ve been given another type of yeast to keep alive.
Yesterday Filippo picked a few bunches from the vineyard that we’re going to be harvesting from in earnest next week. These grapes were then crushed (by foot) and put in a bucket with a bit of water. Over the next few days, while he’s away, I have to keep stirring to aerate this (very attractive) mixture.
Just like sourdough, it will start to ferment and eventually become our natural yeast starter next week. The technical term for this is the pied de cuve – literally “foot of the tank.” And yes, I agree that it sounds far better in French.
The advantage of using a pied de cuve starter is that it allows you to have some confidence in your indigenous yeasts. To know that your yeast is active and already fermenting vigorously gives you a kind of peace of mind that you normally only get with selected strains. It (apparently!) can be quite risky to let fermentation to start directly from your pressed grape juice – especially here where the fermentation takes place in stainless steel in a relatively recent cellar.