A fall harvest can look like it needs to be eaten within weeks, but potatoes, onions, squash, cabbage, root vegetables, and even some fruit can last far beyond harvest season. The catch is that they don’t all want the same storage conditions. Potatoes prefer a cold, moist space, pumpkins need warmer and drier conditions, and sweet potatoes want more warmth than either. Put everything together in one basement corner and some of it may deteriorate long before it should.
The old root cellar worked because temperature and humidity could be matched to crops that needed similar conditions. You can follow the same rules without having one.
Potatoes like it cold but not frozen
Store potatoes at around 35 to 40°F in moderately moist conditions.
A root cellar or unheated home cellar fits those requirements and can keep potatoes through fall and winter.
Keep the temperature above freezing. Potatoes need cold storage, but freezing temperatures aren’t the goal.
Onions want a drier home
Onions can also last through fall and winter, but their humidity requirements differ from potatoes.
Keep them in a cool, dry place, with temperatures close to 32°F.
Dry conditions matter here, which is one reason every fall vegetable shouldn’t be packed into the same container.
Pumpkins and squash need more warmth
Winter squash belongs in another part of the storage space.
Pumpkins and squash prefer about 55°F with moderately dry conditions. Stored that way, they can keep through fall and winter.
That is much warmer than the recommended conditions for potatoes, cabbage, or root crops.
Sweet potatoes want 55 to 60°F
Sweet potatoes need one of the warmest storage spots on the list.
Keep them around 55 to 60°F in moderately dry conditions.
Under those conditions, the harvest can last through fall and winter.
Don’t treat sweet potatoes like ordinary potatoes just because both have potato in the name. Their recommended storage temperatures are quite different.
Cabbage and root crops can stay near 32°F
Late cabbage prefers temperatures close to 32°F with moderate moisture and can last through late fall and winter.
Root crops also prefer temperatures close to 32°F, but want moist conditions.
Late celery fits into the cold group too. Stored with its roots in soil in a root cellar or unheated cellar, it can last through late fall and winter.
Cauliflower has a shorter window. At close to 32°F with moderate moisture, expect around 6 to 8 weeks.
Tomatoes can last another 4 to 6 weeks
Tomatoes don’t need the near-freezing temperatures used for many root vegetables.
Red tomatoes and green tomatoes showing a tinge of red can be kept around 55 to 70°F in moderately dry conditions.
The storage period is about 4 to 6 weeks.
Peppers prefer 45 to 50°F with moderate moisture and have a shorter storage window of about 2 to 3 weeks.
Apples can make it through winter
Apples belong among the longer-lasting fall foods.
Store them in an unheated cellar at temperatures close to 32°F with moderate moisture, and they can keep through fall and winter.
Grapes prefer similar conditions but have a shorter storage life of around 1 to 2 months.
You don’t need a traditional root cellar to use the chart. An unheated dark room can work when it stays within the temperature and humidity range the crop needs. The important part is not treating the entire harvest as one group. Potatoes, onions, squash, sweet potatoes, and tomatoes may all come out of the garden around the same season, but the conditions that help them last are not the same.
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