How to Ripen Green Tomatoes

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Knowing how to ripen green tomatoes is a helpful skill. Perfectly-ripened tomatoes are the most flavorful and robust.

There’s no doubt that vine-ripened vegetables far supersede the flavors of anything you would be able to find in the grocery store.

However, often gardeners are left with green tomatoes on their vines.

Whether the temperature dropped quickly in your area or it’s too hot, you can still make the most of these tomatoes so you don’t have to throw them away.

With the help of this guide, you’ll learn how to quickly ripen tomatoes, using various steps that are easy to follow. Let’s learn how to ripen those delicious tomatoes.

How to Ripen Green Tomatoes

If you were to take a look at your tomatoes while they are ripening, you’d find that some varieties of ripening green tomatoes will turn red on the side that is opposite to the sun.

So, although the popular belief is that your tomatoes need a lot of sunlight to reach the perfect color, that is not always the case.

What seems to be the most important factor is temperature.

Tomatoes that are kept in a warm environment are going to ripen faster than those in cold climates. The optimum temperature for tomatoes to ripen on the vine is 70 – 75 degrees F.

Knowing this allows you to slow down the process by putting them in a cool area or speeding it up by placing them somewhere moderately warm.

Another critical part of the process is ethylene, which is a gas that is typically used during commercial production.

Ethylene is used to help ripen vegetables and fruits before they are sold in grocery stores, which allows them to have entirely red coloring.

With that said, you don’t need an industrial manufacturing plant to take advantage of this gas.

That’s because it is naturally produced by apples and bananas, which is an age-old trick that we will discuss below.

How to Ripen Tomatoes Off the Vine

Even though it would be ideal to allow tomatoes to have more than enough time to ripen on their own, frequently, you will need to refer to how to ripen tomatoes off the vine.

There are plenty of popular methods, ranging from putting them in a paper bag with fruits or storing them in a cardboard box where it’s warm.

We’ll discuss four of the most popular options.

1. Cardboard Box Method

With this method, you will want to find a decently-sized cardboard box that allows you to put all of your tomatoes inside in a single layer.

Ensure that you line the bottom of the box with newspaper or fruit cardboard if you have some available before adding in the tomatoes.

Once they have been entirely spread across the bottom of the box, cover them with another layer of newspaper and place them somewhere warm in your home.

Another variation of this method is to allocate a wooden drawer specifically to ripening tomatoes, as it can have the same effect.

You must check on them regularly to make sure the ripening process has begun and that they haven’t started to spoil.

2. Paper Bag Method

Using the paper bag method, you’ll also be relying on the ethylene gas produced by fruit, such as an apple or a banana.

You will want to put your tomatoes in a paper bag, up to 10 at the most, and add a ripening banana or apple.

Seal the paper bag and place it in a dry and warm location while allowing the fruits and vegetables to ripen at a reasonable pace.

The most important tip for this method is to check for signs of rotting or molding regularly, as this can happen with either the banana or the tomatoes.

3. Jar Method

Another tested and traditional method is to put two to three tomatoes in a glass jar, sealing the container, and then letting it rest in a warm room to speed up the ripening process.

Tomatoes are known to release ethylene on their own, so a sealed jar helps to contain the gas so that they are ripening themselves.

However, this environment is the perfect breeding ground for mold, so you will want to make sure you regularly open the jar to alleviate any excessive moisture or warmth.

4. Hanging Method

Our favorite method for ripening green tomatoes is the hanging method.

It’s a fantastic way to save your plants right before the end of the season and if there is a frost on the horizon.

By removing the entirety of your tomato plant, you can hang it upside down in your cellar or garage as long as it is weatherproofed and moderately warm.

Note that the temperatures will have to be above freezing.

This method allows the sugars in the tomatoes to continue circulating so that they can ripen, even if it’s cold outside.

You’ll find that this is one of the best options for producing flavorful tomatoes with far less effort.

how to ripen green tomatoes

Ripening Tomatoes on the Vine

If you’re fortunate enough to have enough time left in the season to allow your tomatoes to continue ripening on the vine, there are several additional ways to help promote them to transform from a bright green to a deep red.

These are our favorite tips that beginners will love to use, especially if you want to continue growing your tomato plants.

1. Stop Spraying

When you’re heading into fall, there’s no need to continue spraying your tomatoes for diseases, which can reduce the time it takes to manage them.

At this point, your best bet is to remove any diseased leaves and throw them away, rather than maintaining them with disease-resistant sprays.

2. Continue Feeding

It’s best to continue to feed your tomato plants later into the year.

This can help to provide the plant with a little extra energy to help it get the last boost of ripening for the season.

Compost tea is a phenomenal option, as is fish emulsion, to help speed up the ripening process.

3. Protect from Frost

If you know that there is frost in the upcoming forecast, you will want to ensure that you protect your plants so that they don’t die before they have the chance to finish their ripening cycle.

For gardeners who want to keep their plants outdoors until the last minute, we recommend getting your hands on a row cover or a massive sheet that will keep your tomatoes protected.

With that said, you will want to make sure to cover the plants at night and remove the sheet during the day so that they still have enough sunlight.

4. Protect from Heat

If you live in a hot climate, you will want to ensure you are watering enough.

Be sure to keep the tomatoes out of the direct afternoon sun. When it’s over 90 degrees — lycopene and carotene — which are essential to turn tomatoes red — don’t produce. 

If you are growing tomatoes in pots, you can easily move them to a shaded area.

Frequently Asked Questions

Tomatoes are easy to grow. Whether you have just planted your first crop of tomatoes or if you are an experienced gardener, there are plenty of questions about ripening tomatoes to get the most out of your crop as possible.  

1. Can I ripen green tomatoes in the house?

Fortunately, there are several ways that you can ripen your tomatoes in your home, especially if you are looking for a simple, cost-effective solution.

Depending on how dedicated you are to harvesting and ripening tomatoes, you can put them in a separate drawer in your kitchen where it is warm to speed up the process.

You can also place them in a cardboard box until they are ready to use, which can encourage them to shift from green to red.

2. How do you get green tomatoes to turn red?

The process of green tomatoes turning red is also known as ripening. You can help ripen them in many ways.

If you want to learn how to make tomatoes ripe while your plant is still outdoors, you will need to make sure they are regularly protected from pests and blights, as well as frost.

You will also want to make sure you feed them regularly and water them adequately, as this encourages them to produce more energy for a more efficient ripening process.

When it comes to ripening late-season tomatoes indoors, you can use the tips and tricks we discussed above, such as hanging the plant in a cellar or putting them in a paper bag with a fruit that produces ethylene.

3. How long does it take to ripen green tomatoes?

When you’re trying to figure out how to ripen tomatoes, it all depends on the gardener, as each person has their idea of what is ripe to them.

Some individuals prefer to cultivate their tomatoes when they are pink.

Others like to wait until they achieve a deep red color because these could be the most flavorful.

It can take an average of 40 to 60 days for tomatoes to fully ripen and have the red coloring that you expect.

Standard-sized tomatoes can take up to 30 days to blossom to a mature green with an additional 30 days to change color.

4. What is the optimum temperature to ripen tomatoes?

The best temperature in order to ripen tomatoes is 70 – 75 degrees F. When it reaches 90 degrees F and hotter, ripening often slows down or stops completely.

In consistently hot weather, the pigments which give tomatoes their orange and red color can’t produce. These are lycopene and carotene. When this happens, tomatoes remain in their mature green phase.

Ripening Green Tomatoes

Even though green tomatoes are beautiful, they aren’t ideal for eating. It’s important to know how to ripen green tomatoes.

From giving them time to grow properly on the vine to taking the individual crops inside to ripen off the vine, there are plenty of easy ways to help them turn red.

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