What yeast should I use for red wine?

Lalvin RC-212 (Bourgovin) is one of the most popular choices — it handles high sugar, enhances color extraction, and works well with full-bodied reds like Cabernet Sauvignon and Merlot. Lalvin D254 brings spicy complexity, while EC-1118 is a reliable fermenter that works across a wide range of conditions. For a first batch, RC-212 or EC-1118 are both safe choices.

What temperature should red wine ferment at?

Primary fermentation on the skins is best at 75–85 °F (24–29 °C). Warmer temperatures extract more color and tannin from the skins, which is exactly what red wine needs. Secondary fermentation (after pressing) can run cooler at 65–75 °F (18–24 °C). Avoid going above 90 °F (32 °C) — the yeast may produce off-flavors or stall.

What is malolactic fermentation and do I need it?

Malolactic fermentation (MLF) is a secondary bacterial conversion where sharp malic acid turns into softer lactic acid. It is standard practice for nearly all red wines — it rounds out the acidity, adds body, and produces a buttery smoothness. You inoculate with a culture like Lalvin VP41 after primary fermentation is complete, and MLF typically takes 4–8 weeks at 64–72 °F (18–22 °C).

When and how much sulfite should I add?

Add a small dose of potassium metabisulfite (about ¼ teaspoon per 5 gallons, or roughly 50 ppm) right after crushing to suppress wild yeast and bacteria before you pitch your chosen yeast 12–24 hours later. Add another dose after MLF is complete and again at each racking. Before bottling, adjust to about 25–50 ppm free SO2 depending on the wine's pH — lower pH wines need less sulfite.

How long should red wine age before bottling?

Most home-scale red wines benefit from 6–12 months of bulk aging after primary and malolactic fermentation are complete. Light reds like Pinot Noir may be ready in 4–6 months; bigger wines like Cabernet Sauvignon improve with 9–12 months or longer. The wine is ready when it tastes smooth, the tannins have softened, and the flavors have integrated.

When is red wine ready to bottle?

Bottle when the wine is clear (you can read through it), MLF is confirmed complete by chromatography or testing, sulfite levels are adjusted, and it has been stable with no visible activity for at least a month. If the wine is still hazy, fine with bentonite or let it cold-stabilize. Bottling a wine too early risks refermentation or off-flavors developing in the bottle.

Red Wine Making Guide — From Grape to Glass — Ferment Calculator

Making red wine at home is one of the oldest forms of fermentation — and still one of the most rewarding. The process is straightforward: crush grapes, let yeast convert sugar to alcohol while the juice sits on the skins, press, then age until it is smooth and balanced. This guide walks through every stage with practical detail so you can produce a genuinely good bottle from your first vintage.

Equipment you need

Red winemaking needs less specialized gear than you might expect. Most of it overlaps with beer or mead equipment, plus a few wine-specific items for crushing and pressing.

Primary fermenter A food-grade bucket or bin large enough for your grape volume plus room for punch-downs — typically a 7–10 gallon bucket for a 5-gallon batch. The wide opening matters more than the material.

Secondary fermenter A glass or PET carboy (5–6 gallon) fitted with an airlock for the post-press phase. Glass is traditional for wine because it is non-porous and easy to keep clean over long aging.

Crusher/destemmer or hands and a bucket A hand-crank crusher-destemmer speeds things up with large batches. For a small batch of 50–100 lbs, stomping with clean hands or feet works perfectly well.

Press (or a straining bag) A basket or bladder press separates wine from skins after primary. A nylon straining bag squeezed by hand works for small volumes.

You will also need a hydrometer and test jar, a thermometer, potassium metabisulfite (sulfite), siphon tubing, bottles, corks, and a corker. A hydrometer temperature correction tool helps you get accurate gravity readings at any must temperature.

Choosing and preparing grapes

The quality of your wine starts in the grapes. Fresh wine grapes — Vitis vinifera varieties such as Cabernet Sauvignon, Merlot, Zinfandel, Syrah, or Pinot Noir — give far better results than table grapes, which lack the tannin, acidity, and sugar balance that winemaking demands.

Source Buy from a local vineyard, a home winemaking supplier, or order fresh-crushed grapes shipped in season (typically September–October in the Northern Hemisphere).

Quantity Plan on roughly 15–20 lbs of grapes per gallon of finished wine. A 5-gallon batch takes about 75–100 lbs.

Sugar level Aim for grapes harvested at 22–26 °Brix (about 1.092–1.110 specific gravity). Use a refractometer or the Brix conversion calculator to check.

Condition Discard any moldy, raisined, or underripe clusters. A few imperfect berries in a large batch are fine, but sort out anything clearly damaged.

If you cannot source fresh grapes, frozen must or sterilized juice kits are a reliable alternative — they skip the crushing step and come with measured acidity and sugar. Use a Brix converter to translate refractometer readings into specific gravity.

Crushing and destemming

Crushing breaks the grape skins so juice, pulp, and skins mix together into a mass called must. Destemming removes the green stems, which can add harsh, vegetal tannins if left in.

1
Sort the clusters Remove leaves, insects, and any rotten or shriveled berries. A quick visual pass is enough.
2
Destem Pull berries off the stems by hand or run them through a crusher-destemmer. Some winemakers leave a small percentage of whole clusters for added tannin structure — this is a stylistic choice, not a requirement.
3
Crush gently Break the skins so juice flows freely, but avoid pulverizing the seeds — cracked seeds release bitter oils. Gentle hand-crushing or a single pass through a roller crusher is ideal.
4
Sulfite the must Add approximately ¼ teaspoon of potassium metabisulfite per 5 gallons of must (about 50 ppm SO2). This suppresses wild yeast and bacteria for 12–24 hours while you prepare your cultured yeast.

Transfer the crushed must — juice, skins, pulp, and seeds — into your primary fermenter. Keep it covered loosely; you want air exchange at this stage, not an airtight seal.

Primary fermentation

Primary fermentation is where sugar becomes alcohol and where red wine develops its color, tannin, and body through extended skin contact. This stage typically lasts 5–10 days.

75–85 °F ideal fermentation temperature (24–29 °C)

5–10 days typical primary duration on skins

2–3×/day punch-down frequency

Pitching yeast: Wait 12–24 hours after your sulfite addition, then rehydrate your chosen wine yeast (such as Lalvin RC-212 or EC-1118) according to the packet instructions and pitch it into the must. Stir gently to distribute.

Temperature: Red wine ferments warmer than white — 75–85 °F (24–29 °C) is the target range. Warmer temperatures extract more color and tannin from the skins. If your fermentation area is cooler, consider a fermenter heating wrap. Avoid exceeding 90 °F (32 °C), which can stress the yeast and produce off-flavors.

Punch-downs: As fermentation begins, the skins float to the surface and form a thick cap. Push this cap back down into the juice two to three times per day with a clean utensil or your sanitized hand. Punch-downs ensure even extraction and prevent the cap from drying out, which invites acetobacter (vinegar bacteria).

Monitoring gravity: Take daily hydrometer readings. Starting gravity for a typical red is around 1.090–1.110. The ABV calculator lets you track your progress and estimate final alcohol. When gravity drops to about 1.010–1.000 (or lower), it is time to press.

Pressing and secondary fermentation

Pressing separates the new wine from the spent skins, seeds, and pulp. The timing is a stylistic decision — pressing earlier (at a higher gravity) gives a lighter, fruitier wine; pressing later (near dryness) produces a fuller, more tannic wine.

1
Transfer must to the press Scoop or pour the fermented must into a basket press or a nylon straining bag. Let the free-run juice drain first — this is the highest quality portion.
2
Press gently Apply pressure gradually. The first pressings are the best; heavy pressing extracts harsher tannins. Many home winemakers keep the first and last pressings separate and blend to taste later.
3
Combine and transfer Pour the pressed wine into a glass carboy, filling it as close to the neck as possible to minimize air contact. Fit an airlock.
4
Let secondary finish Fermentation will continue in the carboy for another 1–2 weeks as the remaining sugar ferments out. Gravity should reach 0.998 or below for a dry red wine.

Try the calculator

ABV Calculator

Enter your original and final gravity readings to see your wine's alcohol content.

Open calculator →

Malolactic fermentation

Malolactic fermentation (MLF) is not a second alcoholic fermentation — it is a bacterial conversion where sharp malic acid (the acid in green apples) is transformed into softer lactic acid (the acid in yogurt). Nearly all commercial red wines undergo MLF, and your homemade red should too.

When to inoculate Add a malolactic culture (such as Lalvin VP41 or Chr. Hansen Viniflora) after primary fermentation is complete and you have pressed the wine. The wine should be above 60 °F (16 °C) and free of residual sulfite — wait at least two days after any sulfite addition.

Temperature MLF works best at 64–72 °F (18–22 °C). Below 60 °F it stalls; above 77 °F it may produce off-flavors. Keep the carboy in a warm room or use a heating belt.

Duration Typically 4–8 weeks. The wine may look still — MLF produces very little visible activity. Confirm completion with a chromatography test kit or by having a sample tested for malic acid.

Do not add sulfite during MLF Sulfite kills the malolactic bacteria. Wait until MLF is confirmed complete before making any sulfite additions.

Aging and oak

Once MLF is confirmed complete, the wine enters its bulk aging phase. This is where rough tannins soften, flavors integrate, and the wine develops complexity.

How long: Light reds like Pinot Noir or Gamay may be ready in 4–6 months. Full-bodied reds like Cabernet Sauvignon, Syrah, or Merlot benefit from 9–12 months. Taste periodically — when the wine is smooth and balanced, it is ready to bottle.

Oak options: Real oak barrels are expensive and need careful maintenance, but oak alternatives give home winemakers excellent results at a fraction of the cost:

Oak cubes or chips add 1–2 oz per 5 gallons. Chips work faster (2–4 weeks); cubes release flavor more gradually over 2–6 months. Medium-toast French or American oak are both common.

Oak spirals or staves a middle ground — more surface area than cubes, less than chips. Good for 2–4 months of contact.

No oak many fruit-forward reds (Zinfandel, lighter Pinot Noir) are beautiful unoaked. Skip oak if you want pure fruit expression.

Racking: Siphon the wine off its sediment (lees) every 2–3 months during aging. Each racking leaves behind dead yeast and grape solids and gives you a clearer, cleaner wine. Top up the carboy after each racking to minimize headspace.

Sulfite additions and stabilization

Sulfite (potassium metabisulfite) protects wine from oxidation and microbial spoilage. It is used at several stages, and the amount depends on the wine’s pH — lower pH wines need less sulfite because the acid itself provides some protection.

50 ppm at crush (pre-fermentation)

25–50 ppm at each racking

25–50 ppm pre-bottling (adjusted by pH)

As a general rule: wines with a pH below 3.4 need about 25 ppm free SO2; wines above 3.6 need 40–50 ppm. Use sulfite test strips or a titration kit to measure free SO2 before bottling. If you plan to backsweeten, also add potassium sorbate alongside the sulfite to prevent refermentation.

! Watch for

Never add sulfite during active malolactic fermentation — it will kill the bacteria
More is not better — excessive sulfite produces a harsh, chemical smell that does not dissipate
Always measure by weight or use calibrated additions rather than guessing
Sulfite sensitivity is real — label homemade bottles if sharing with others

Bottling

Bottling is the final step, and patience here is rewarded. A wine bottled too early can develop off-flavors or throw sediment in the bottle.

1
Confirm stability The wine should be clear, MLF confirmed complete, and no bubbles or activity visible for at least a month. Final sulfite should be adjusted to the target free SO2 for the wine's pH.
2
Fine if needed If the wine is hazy, fine with bentonite (for protein haze) or let it cold-stabilize at near-freezing temperatures for 1–2 weeks, then rack off the sediment.
3
Sanitize everything Bottles, corks, siphon, tubing — sulfite solution or Star San. Consistent sanitation at this stage prevents spoilage after months of work.
4
Fill and cork Siphon into bottles, leaving about ½ inch of headspace below where the cork will sit. Use a floor or hand corker to insert #9 natural or agglomerated corks.
5
Store upright, then on their side Leave bottles upright for 3–5 days so the corks seal fully, then store on their sides in a cool, dark place (55–65 °F / 13–18 °C). The wine will continue to improve for months or years in bottle.

Most home red wines drink well within 1–3 years of bottling, though well-made Cabernet Sauvignon or Syrah from quality grapes can age much longer. Open a bottle every few months to track how it evolves — that tasting log becomes invaluable for your next vintage.

Red Wine Making Guide — From Grape to Glass