No Joy on MLF
Thursday, February 22nd, 2007Chromatography indicates only one of the ‘06 wines has completed the conversion of malic acid into lactic acid. This process, called malolactic fermentation (MLF), is an anerobic bacterial thing - they perform in the absence of oxygen. Simply stated, because that’s the only way I understand it, the little buggers eat the malic and produce lactic acid. Malic acid is the type of crispy acid found in apple, lactic acid is softer, like the acids in milk.
Wines that have not undergone MLF are not biologically stable and will spontaneously commit MLF at some point in their lives, most likely at the worst possible time. If a wine hasn’t completed MLF it must be filtered to be stable in the bottle. White wines usually do not go through MLF, Chardonnay the biggest exception. Red wines almost always do MLF.
I don’t like to rack wine while it is doing the MLF thing. Some people say it doesn’t matter. I’m of the opinion that the lees contribute a great deal of nutrients to the MLF buggers, and since the point of racking is to eliminate the lees, I don’t rack until MLF is complete.
How do we get our wines to finish MLF? It’s temperature dependent, so once the winery warms up this spring MLF will happen.











Wow. The winery was packed from 11:30 a.m. to 5 p.m. And I mean packed. We’ve got about 18 bottles of ‘04 Zinfandel left and only seven cases of ‘04 Syrah.