How long does it take to ripen tomatoes off the vine?

On a countertop at room temperature, mature green tomatoes ripen in 3 to 5 days. In a paper bag with a ripe banana or apple, they can ripen in 1 to 3 days. Cooler temperatures slow the process.

Should I put tomatoes in the sun to ripen?

No. Direct sunlight heats tomatoes unevenly, causing the sunny side to soften and spoil before the rest is ripe. A countertop out of direct sun gives the most even results.

Can I ripen tomatoes in the refrigerator?

No. Cold stops the ripening process and damages flavor. Only refrigerate fully ripe tomatoes, and use them within a few days for best taste.

What do I do with green tomatoes that won't ripen?

If they stay hard after a week, they were likely picked too early. Use them for fried green tomatoes, pickles, or salsa verde. You can also try ripening them slowly in a cool, dark place if they show some color.

How to Ripen Tomatoes Off the Vine: Countertop, Windowsill, and Ethylene Tricks

Should You Ripen Tomatoes Off the Vine at All?

Yes, in most cases. Tomatoes picked at the mature green stage—when they've reached full size and show a slight color change—will continue to ripen off the vine. The plant sends sugars and acids into the fruit during the final days, but a tomato that's already formed will still develop good flavor and color indoors.

The exception is fruit picked too early, while still hard and fully green with no hint of pink or yellow. Those will soften and turn red but often stay bland and mealy. If your tomatoes were picked because frost was coming, they may still be worth ripening, but expect a trade-off in taste.

For the best results, pick tomatoes when they're mature green or beginning to show color. That gives you the widest window to ripen them indoors without losing the sweetness you'd get from vine-ripening.

Cluster of green tomatoes hanging on a vine in a garden

What's the Fastest Way to Ripen a Tomato?

The fastest way to ripen a single tomato is to place it in a paper bag with a ripe banana or apple. The banana or apple releases ethylene gas, a natural plant hormone that triggers ripening. The bag traps the gas, concentrating it around the tomato. This method can ripen a mature green tomato in 1 to 3 days, compared to 3 to 5 days on the counter.

If you don't have a banana or apple, just the paper bag alone will still help by trapping the tomato's own ethylene. But adding a ripe fruit speeds things up noticeably. Check the tomato daily, because it can go from ripe to overripe quickly in a bag.

Avoid plastic bags. They trap too much moisture, which can lead to mold and rot. Paper bags let the tomato breathe while still holding the ethylene.

Paper bag method: place tomato with a ripe banana or apple, fold the top closed, and check daily.
Counter method: leave tomato stem-side up at room temperature, away from direct sun.
Windowsill method: place tomato on a sunny windowsill, but rotate it daily to prevent uneven ripening.

Countertop vs. Windowsill: Which Works Better?

Countertop is the more reliable method. A counter at room temperature (65–75°F) allows ethylene to circulate naturally and ripens the tomato evenly. Direct sunlight on a windowsill can heat the tomato unevenly, causing the side facing the sun to soften and spoil before the rest is ripe.

Windowsills work if you rotate the tomato daily and the sill stays cool, but they're not ideal. The sun can also fade the color, leaving a tomato that looks ripe but tastes underdeveloped. A countertop in a well-ventilated spot, away from heat sources, gives you the most consistent results.

For multiple tomatoes, spread them in a single layer on a tray or counter, not touching. Stacking them traps moisture and can lead to rot. Turn them every couple of days so they ripen evenly.

Method	Time to ripen	Best for
Countertop	3–5 days	Even ripening, multiple tomatoes
Windowsill	3–7 days	Single tomato, if no other spot
Paper bag with banana	1–3 days	Speeding up one or two tomatoes

How Do Ethylene Tricks Actually Work?

Ethylene is a gas that plants produce as they ripen. Tomatoes produce their own ethylene, but you can boost the concentration around them to speed things up. The classic trick is to pair tomatoes with a ripe banana or apple in a closed paper bag. The ripe fruit emits ethylene, and the bag keeps it close to the tomato.

You can also use an ethylene-producing fruit without a bag by placing it next to the tomatoes on the counter. This works but is slower because the gas disperses. For a more controlled boost, the bag method is best.

One caution: don't put tomatoes in the refrigerator to ripen. Cold temperatures halt ethylene production and stop the ripening process. Once chilled, a tomato won't regain its full flavor. Only refrigerate tomatoes after they're fully ripe, and even then, it's best to use them within a few days.

A paper bag with a tomato and a banana peeking out on a kitchen counter

What About Green Tomatoes That Won't Ripen?

Some tomatoes simply won't ripen, no matter what you do. This happens when they were picked too early, or when the plant was stressed by heat, drought, or disease. A tomato that stays hard and green after a week on the counter is unlikely to improve. You can still use it for fried green tomatoes, pickling, or salsa verde.

If you have a large batch of green tomatoes at the end of the season, you can ripen them slowly in a cool, dark place like a basement or garage, at around 55–65°F. This method takes 2 to 4 weeks and works best for tomatoes that are already showing a bit of color.

Check them regularly and remove any that develop soft spots or mold. One bad tomato can spread rot to the others, so keep them spaced out and inspect every few days.