How to Ripen Green Tomatoes Fast Before Frost Arrives
Every gardener eventually faces the same late-season challenge: a plant full of gorgeous green tomatoes just as cold weather rolls in. It can feel like a race against time, but the good news is that tomatoes are far more cooperative than they seem. With a few simple techniques, you can ripen your tomatoes quickly — even if frost is on the way.
Before diving into the tricks, there’s one key detail to understand: tomatoes only ripen when conditions are right.
Watch the video version of this guide:
Why Tomatoes Stay Green Late in the Season
Tomatoes begin to turn red when they release ethylene, a natural plant hormone. But ethylene production only happens when temperatures sit between 70–85°F.
Too hot or too cold?
Ethylene slows down or stops completely, leaving tomatoes stuck in the green stage.
So as nights get cooler, ripening slows — but that doesn’t mean you’re out of luck. Here are four gardener-approved ways to speed things up and save your harvest.
1. The Paper Bag Trick
If your tomatoes have reached full size but are lingering green, this is the easiest fix.
How to do it:
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Place green tomatoes in a brown paper bag
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Add a ripe banana or apple
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Leave the bag loosely closed on your counter for a few days
Bananas and apples release ethylene gas, kick-starting the ripening process naturally.
2. Pick Them Early (at the First Blush)
Tomatoes ripen from the bottom up.
If you see even the slightest blush of color — especially on the underside — pick them.
They will finish ripening beautifully indoors, and you’ll avoid:
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Birds pecking into them
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Critters stealing them
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Cold damage from approaching frost
This “breaker stage” is actually the ideal time to harvest late-season tomatoes.
3. Pull-and-Hang Method (When Frost Is Imminent)
If temperatures are expected to drop below 35°F, don’t wait.
Do this instead:
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Pull up the entire tomato plant by the roots
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Hang it upside down in a warm, dry space (garage, pantry, spare room)
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Let the remaining fruit ripen on the vine
The plant continues to feed the tomatoes with its stored energy, allowing them to ripen off the plant but still attached.
If frost won’t dip below 35°F and there’s no snow, you can safely leave plants outdoors.
Pro tip:
Try storage tomato varieties next season. These heirlooms were bred to hang and stay fresh for months — a traditional method still used in Spain and Italy.
4. Encourage Ripening on the Vine
If you still have a little time before frost, help the plant focus its energy where it matters.
To speed up ripening:
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Prune excess leaves shading the fruit
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Reduce watering slightly to create mild stress
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Remove new flowers and small fruit clusters
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Top the plant (remove upper growth above the top fruit cluster)
All of these redirect the plant’s resources toward ripening what’s already growing instead of trying to produce more foliage or flowers.
Ripening green tomatoes before frost doesn’t have to be stressful. With the right techniques, you can save nearly every tomato on your vines — whether you encourage faster ripening outside or bring the fruit indoors.
If you’d like to grow the same varieties I feature in my garden, you’ll find seeds available here on my website HERE.
Happy gardening!