09/19/2026
Don’t give up on your green tomatoes when cold weather arrives. If the fruit has reached the mature-green stage, you may be able to keep the harvest going for several more weeks indoors.
One old-fashioned method is surprisingly simple: before frost or a killing freeze, pull up the entire tomato plant and shake off the excess soil. Hang it upside down in a frost-free, ventilated garage, shed, basement, or enclosed porch. University Extension guidance confirms that whole plants can be uprooted and hung in sheltered locations while the remaining fruit ripens.
The important part is choosing tomatoes that are mature enough. Look for fruit that is full-sized or nearly full-sized and beginning to change from dark green to a paler or whitish green. Some mature fruit also looks glossier or develops a pale patch near the blossom end. Tomatoes that remain small, hard, and uniformly dark green usually won’t develop the same flavor or quality indoors.
Tomatoes don’t need sunlight to turn red. Once mature, they naturally produce ethylene, which drives ripening even after harvest. For active ripening, temperatures around 65–70°F are generally best. Keeping them closer to 60–65°F slows the process, which can be useful when you want tomatoes to ripen gradually over several weeks.
You don’t have to hang the entire plant, either. Mature-green tomatoes can be picked and placed in a single layer in a box or paper bag. A ripe apple or banana can add extra ethylene and speed things along. Check the tomatoes every few days and remove any showing rot or damage. For an even slower harvest, wrap sound tomatoes individually in paper and keep them in a cool room.
A sunny windowsill isn’t necessary. Light plays little role in tomato ripening, and direct sun can warm fruit more than needed. A comfortable indoor location away from strong sunlight works well.
And don’t refrigerate tomatoes that are still trying to ripen. Extended exposure to cold temperatures can reduce flavor quality and cause chilling injury. Once a tomato is fully ripe, though, refrigeration can help slow further softening if you aren’t ready to eat it.
If some tomatoes are simply too immature to ripen well, they don’t necessarily have to go to waste. Use them for fried green tomatoes, chutney, refrigerator pickles, relish, or green tomato salsa.
Most importantly, watch the forecast. Harvest worthwhile fruit before frost rather than waiting to see whether it survives. Mature-green tomatoes brought indoors in time can keep a little taste of the garden going well beyond the end of the growing season.
