Can You Store Onions and Potatoes Together?
No—not for long-term storage. Onions need drier air, while potatoes need darkness and more humidity. Use two ventilated containers and separate storage zones.
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9 practical guidesHarvest-to-storage reference
Harvest and curing conditions are not interchangeable.
Carrots can sometimes stay in the ground; sweet potatoes need warmth and high humidity; butternut squash, onions, and garlic need drier airflow. Compare the researched targets before moving a crop into storage.
| Crop | Cure | Store |
|---|---|---|
| Carrots | No curing; leave sound roots after light frost under heavy mulch | In-ground while soil stays workable, or 32–35°F at 98–100% humidity |
| Apples | No curing; sort sound, mature fruit and keep it unwashed | 32–40°F in perforated bags; keep separate from potatoes and squash |
| Butternut squash | About 10 days at 75–80°F with dry airflow | 50–55°F, dry and ventilated; keep fruits separated |
| Sweet potatoes | 7–10 days at 80–85°F and 85–90% humidity | 55–60°F, dark and ventilated; do not refrigerate |
| Potatoes | About 2 weeks at 50–60°F, dark and ventilated | 40–45°F for most kitchen uses; protect from light |
| Onions | 2–3 weeks in a warm, dry, airy place | 32–40°F and 65–70% humidity with airflow |
| Garlic | About 3–4 weeks in a warm, dry, airy place | Cool and dry with airflow; avoid freezing |
Storage compatibility check
Which crops can share a storage zone?
Temperature is only one part of storage. Humidity, light, and ethylene can make two individually sound crops poor neighbors.
| Crop pair | Verdict | Why |
|---|---|---|
| Potatoes + onions | Store separately | Onion ethylene can encourage potato sprouting or spoilage; potato moisture can make onions brown and rot. |
| Potatoes + apples | Store separately | Ripening apples release ethylene that promotes potato sprouting. |
| Onions + garlic | Same dry zone; separate containers | Both suit 32–40°F and 65–70% humidity after curing, with good airflow. |
| Carrots + onions | Use different humidity zones | Carrots need nearly saturated humidity; onions keep best in moderately dry air. |
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Can You Leave Carrots in the Ground Over Winter?
Yes—carrots can stay in well-drained garden soil after light frosts when a heavy mulch keeps the ground workable. Know when winter, water, or pests make indoor storage safer.
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How to Store Apples Without a Root Cellar
Store sound apples in a refrigerator crisper or another monitored 32–40°F space, using perforated bags to retain humidity without trapping condensation.
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Do You Need to Cure Butternut Squash Before Storing It?
Yes—cure mature butternut squash for about 10 days in a warm, ventilated place, then store it dry at 50–55°F without letting fruits touch.
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How to Cure Sweet Potatoes After Harvest
Cure freshly harvested sweet potatoes immediately at 80–85°F and 85–90% humidity for 7–10 days, then store them dark and ventilated at 55–60°F.
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How to Cure Garlic After Harvest So It Lasts
Cure freshly dug garlic with the tops attached in a warm, dry, airy, shaded place for about 3–4 weeks, then trim, sort, and store it cool and dry.
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How to Cure Onions After Harvest So They Last
Harvest mature storage onions in dry weather, cure them in one airy layer for 2–3 weeks, then store only firm, dry bulbs at 32–40°F.
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How to Store Potatoes Without a Root Cellar
Use the coolest dark, ventilated place you can keep near 40–45°F—and store only an amount that location can realistically protect.
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A Small Frugal Garden Plan for People Who Actually Eat the Harvest
Choose high-use crops, measure yield, and avoid turning a money-saving garden into an expensive hobby.
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