Grape tomatoes last only about five days in the refrigerator and just one to two days on the counter, so preserving them makes sense if you have more than you can eat. The best method depends on how much time you want to invest and how you plan to use them later. Freezing is the fastest option, while drying, pickling, canning, and fermenting each offer different flavors and shelf lives.
Getting the Most Out of Fresh Storage
Before turning to preservation, it helps to know how to stretch the life of fresh grape tomatoes. The ideal storage temperature is between 45 and 60°F with high humidity, which keeps them in good shape for up to 10 days. Most homes don’t have a spot that cool outside of the fridge, so a basement, garage, or cool pantry works if you have one.
Refrigeration below 41°F gives you roughly five days but dulls flavor and changes texture. If you do refrigerate, let them come to room temperature before eating. On the counter at temperatures under 75°F, expect only one to two days before they start to wrinkle or split. Store them stem-end up. The shoulders of a tomato are the softest part, and leaving them stem-side down leads to bruising.
Freezing: The Fastest Method
Freezing is the simplest way to preserve grape tomatoes in bulk. Wash them, then dip them in boiling water for about 30 seconds to loosen the skins. Core and peel them, then pack into freezer-safe containers or bags with about an inch of headspace to allow for expansion. Seal tightly and freeze.
If you want to skip the blanching step, you can spread washed, dry grape tomatoes on a parchment-lined baking sheet in a single layer and freeze them for a couple of hours until solid, then transfer to bags. This flash-freeze approach keeps them from clumping together so you can grab a handful at a time.
Frozen tomatoes keep well for six to eight months. They will not be firm when thawed, so plan to use them in sauces, soups, stews, and braises rather than salads.
Dehydrating for Concentrated Flavor
Drying grape tomatoes intensifies their sweetness dramatically. Their small size and low moisture content (compared to larger tomato varieties) make them well suited to dehydrating.
Slice each tomato in half lengthwise and lay the halves cut-side up on dehydrator trays. Set the temperature to 140°F. Drying takes 10 to 18 hours depending on the size of the tomatoes and the humidity in your kitchen. They’re done when they feel leathery and pliable with no visible moisture.
Oven Drying as an Alternative
No dehydrator? Your oven works fine. Halve the tomatoes, toss with a little olive oil, salt, and pepper, and spread them cut-side up on a parchment-lined sheet pan. Start at 350°F for about 30 minutes to get the initial moisture moving, then drop the temperature to 225°F and continue for roughly four more hours, checking occasionally. Pull them when they reach your preferred level of dryness.
Fully dried tomatoes stored in an airtight container at room temperature last several months. You can also store them in olive oil in the refrigerator for up to six months, but there’s an important safety rule: the tomatoes must be completely dried until leathery or crisp with no residual moisture before going into oil. Any remaining moisture in a low-acid vegetable submerged in oil creates an oxygen-free environment where botulism-causing bacteria can grow. If you add garlic or herbs to the oil, the mixture must be used within four days or moved to the freezer.
Quick Pickling in the Refrigerator
Pickled grape tomatoes are tangy, snackable, and ready in as little as a day. The basic brine is equal parts water and white wine vinegar (half a cup of each for a small jar) with a teaspoon of kosher salt. Heat the brine until the salt dissolves, let it cool slightly, and pour it over whole or halved grape tomatoes packed into a clean jar. You can add garlic cloves, dill, peppercorns, red pepper flakes, or whatever spices you like.
Seal the jar and refrigerate. The tomatoes will be lightly pickled within 24 hours and more intensely flavored after two to three days. Refrigerator pickles keep for about a month as long as the tomatoes stay submerged in brine. They’re excellent on salads, cheese boards, and grain bowls.
Fermenting for Probiotics and Tang
Fermentation takes pickling a step further by using salt and naturally occurring bacteria rather than vinegar. The result is a fizzy, sour tomato with probiotic benefits.
Dissolve three tablespoons of kosher, pickling, or sea salt in four cups of unchlorinated water (chlorine inhibits the bacteria that drive fermentation). Do not use iodized table salt. Pack whole grape tomatoes into a wide-mouth jar, add garlic or herbs if you like, and pour the brine over until the tomatoes are completely submerged. Weight them down to keep them below the brine surface.
Leave the jar at room temperature, loosely covered to let gas escape, for three to seven days. You’ll see bubbles forming after a day or two. Taste daily starting around day three. Once the sourness reaches a level you enjoy, cap the jar and move it to the fridge, where fermentation slows to a crawl. You can reduce the salt to one tablespoon per four cups of water for a milder result, though a 3% to 5% brine (relative to the total weight of water plus vegetables) gives the most consistent fermentation.
Water Bath Canning for Shelf Stability
Canning gives grape tomatoes the longest shelf life of any preservation method, typically 12 to 18 months in a cool, dark pantry. Because tomatoes sit right on the borderline between high-acid and low-acid foods, you need to add acid to every jar to make water bath canning safe.
The required amounts per jar are:
- Pint jars: 1 tablespoon of bottled lemon juice or ¼ teaspoon of citric acid
- Quart jars: 2 tablespoons of bottled lemon juice or ½ teaspoon of citric acid
Use bottled lemon juice rather than fresh because its acidity is standardized. Add the acid directly to the jar before packing in the tomatoes. You can pack grape tomatoes whole, which is one of their advantages over larger varieties. Cover with hot water or tomato juice, leave the recommended headspace for your jar size, and process in a boiling water bath following tested times for your altitude. The National Center for Home Food Preservation publishes specific processing times that vary by jar size and whether you pack raw or hot.
Choosing the Right Method
Your choice comes down to time, equipment, and how you want to use the tomatoes later. Freezing requires almost no effort and works for any cooked application. Dehydrating takes the most patience but produces a pantry-stable ingredient with intense flavor that works in pasta, on pizza, or blended into sauces. Pickling and fermenting are quick to set up and create a ready-to-eat snack, though both require refrigerator space. Canning is the most involved upfront but frees you from needing fridge or freezer room entirely.
If you’re dealing with a sudden glut of grape tomatoes from the garden, freezing and oven drying handle large batches efficiently. For smaller quantities, a jar of pickled or fermented tomatoes is satisfying and practically effortless.