How to Store Butternut Squash

There's no reason we shouldn't all have a few extra butternut squash in the house all winter. It's versatile, nutrient-rich, and lasts for months if stored properly. Whether you've grown your own or stocked up at the farmer’s market, learning how to store these types of squash makes it possible to have the fruit on hand well into the winter months. We're not talking about freezing chunks of raw butternut squash or making a puree for future meals; with proper curing and the right storage conditions, you can set yourself up for whole fruit long-term storage.

Proper storage begins with selecting or harvesting fully mature fruit. Once harvested, curing the winter squash and finding the right storage conditions will keep it in prime condition.

Step 1: Remember to Cure the Squash

Before storing, the skin of butternut squash needs to be cured to harden and help the squash taste sweeter. Squash cures in about 10 days if you keep it in a warm, dry spot. During the curing process, the skin will toughen, protecting it from moisture loss and decay.

Butternut squash harvested and stored in one layer. — Lay butternut squash flat during curing and while in storage. Avoid piling them to promote good airflow. Credit: Nugroho Ridho / Getty Images

Step 2: Choose the Right Storage Conditions

After curing, move the butternut squash to a cool, dark place. The ideal temperature is between 50-55°F with a humidity level of around 60-70%. Basements, cellars, or garages can be great options, as long as they stay dry and maintain a consistent temperature. Avoid storing squash near apples, potatoes, or other fruits that release ethylene gas, because it causes premature ripening and spoilage. You should also avoid storing it in an area that freezes; frost-damaged fruit is prone to

Step 3. Check Regularly for Spoilage

Throughout the storage period, check your squash every couple of weeks for signs of brown spots or rotten spots. If you see any issues, use the affected fruit promptly to prevent further storage diseases. Discard if it is unusable.

A butternut squash rots in storage. — Stored in the wrong conditions, butternut squash can begin to rot over the winter. Be sure to keep an eye on them and discard if they begin to decay. Credit: lassi meony / Getty Images

Best Practices for Extending the Shelf Life

Butternut squash can last for 2-4 months if stored in the right conditions; the best quality squash might even last upwards of six months. Here are a few tips to help extend its shelf life:

Harvest it on Time: Pick the squash before night temperatures cause the fruit to deteriorate. It's best if you can harvest them once the vines and leaves dry out.
Avoid Moisture: Keep all varieties of squash dry at all times during storage. Moisture on the skin can lead to mold and mushy spots.
Handle Gently: Be careful when moving or handling the fruit, as bruising or damaging the skin of winter squash can lead to quicker decay.
Keep in a Single Layer: Don’t stack ripe butternut squash on top of each other, as the weight and lack of airflow can cause mold to form. Instead, place them in a single layer with space between each squash.

Butternut squash hang on vines of a trellis in the late summer.

How Long Should I Leave Butternut Squash to Grow on the Vine?

Harvest your butternut squash too late, and you'll notice a difference.

Can I store butternut squash in the refrigerator?

It’s best to avoid refrigerating whole butternut squash. The cold, humid environment can cause the skin to soften and spoil faster. You should only refrigerate cooked or raw cubed butternut squash, but remember to use it within a week.

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How do I know if my butternut squash has gone bad?

Best case scenario, it'll keep firm for months; however, remember to check regularly for soft spots, mold, or an unpleasant odor. If any of these signs appear, it's no longer a food you want to eat.