by Tim Hall on Thu Jul 10, 2008 10:15 am
Mead can sometimes be a tough brew to make. To some degree honey is antagonistic to yeast growth (as it should be or we’d have a lot of drunk bees buzzing around). One reason honey is tough to ferment is while it supplies plenty of carbs for the yeast to turn to alcohol and CO2, it supplies very little of the nitrogen, vitamins and minerals essential for healthy yeast growth. Raw honey may also contain enzymes and antibiotics that further inhibit yeast growth. But there are things you can do to encourage strong fermentation nevertheless…
1) Try using a lower honey-to-water ratio. Too much honey makes it very tough for yeasts to get started. Once the yeasts get started you can feed them more honey to make the brew stronger or sweeter. But too much honey will shut down even the most vigorous yeasts.
2) Add nutrients. You can add fruit, flowers or bee pollen to the mix to encourage yeast growth. This does two things: it adds nitrogen, vitamins and minerals, and it supplies wild yeasts that inhabit the surface of these additives. In the old days mead was probably made by tossing the whole comb in a boiling vat, including honey, pollen and bee larvae, which provided a complete source of nutrition for yeast.
3) Aerate. This has been mentioned before. Stir, stir, stir for the first 3-5 days, or until you see obvious signs of fermentation. As an alternative to stirring you can place the must in a sealed container and shake it vigorously for several minutes to dissolve oxygen into it. Yeasts need oxygen just like us.
4) Add tannin. It seems to me that adding some type of tannin helps the fermentation. Sources of tannin include tea, herbal teas, yaupon leaves (Ilex vomitoria), or store-bought tannin extracts. Brew up a strong cup and add it to the must. Herbal teas can also provide an interesting twist to the flavor of your mead.
5) Make a starter. Next time try making a small starter (around 10% of your total batch volume) using a diluted must. Use about half the honey called for in the recipe. Once this starts to ferment well, mix up your full recipe and add the starter. Again stir, stir, stir.
In my opinion if you don’t see signs of fermentation after 5 days, it’s time to take drastic measures. Try cutting the must with a little extra water (chlorine-free), aerate again and add some fruit (raisins are a good choice) to help the yeast get started. As a last resort don’t think you have to wait for wild yeasts to the do the job – go buy a packet of Pasteur’s best from your local wine-making shop.