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Hubbard squash are ready to pick when their skins have hardened into a tough shell and the vine has started to die back.
That’s the short answer, but telling when a Hubbard squash is ready to pick isn’t always as simple as checking the calendar.
These big, bumpy winter squashes can be a bit stubborn about showing their ripeness, but once you learn a few key signs, you’ll know exactly when to harvest.
If you’ve been wondering when are Hubbard squash ready to pick in your garden, you’re in the right place.
In this post, we’ll walk through the telltale signs that a Hubbard squash is ready to pick, how to test for maturity, and what happens if you pick too early or too late.
Let’s dig in and get your Hubbard squash harvest timing just right.
When Are Hubbard Squash Ready to Pick: The Main Signs
Knowing when are Hubbard squash ready to pick really comes down to watching the plant and the fruit itself.
While there’s a general timeframe, the best indicators are visual and physical.
Here’s what to look for when you’re trying to decide if your Hubbard squash is ready to pick.
1. The Skin Has Become Rock Hard
The absolute best way to know a Hubbard squash is ready to pick is by testing the skin’s hardness.
When your Hubbard squash is ready to pick, you shouldn’t be able to dent the skin with your thumbnail.
Press your nail gently into the flesh; if it leaves a mark, it’s not ready yet.
A mature Hubbard squash will have a shell so tough that you’ll need a knife to cut it open.
This hardened rind is the plant’s way of saying the fruit is fully mature and ready for storage.
2. The Stem Has Started to Cork and Turn Brown
Another reliable sign that a Hubbard squash is ready to pick involves the stem attached to the fruit.
On a ripe squash, the stem will begin to dry out, turn brown, and look a bit corky.
If the stem is still green and pliable, the squash is still receiving nutrients from the vine.
Wait until that stem looks dry and slightly shrunken, which usually signals that the squash has stopped growing.
Be sure to leave a few inches of that stem attached when you pick Hubbard squash to prevent rot.
3. The Vine Is Starting to Wither and Die Back
Nature gives you another clear clue when your Hubbard squash is ready to pick: the vine itself.
As the squash reaches full maturity, the vine that feeds it will start to yellow, dry up, and die back.
This natural dieback is the plant focusing all its remaining energy on the developing fruit.
If you see the leaves around your Hubbard squash turning brown and crispy, that’s a great sign that the fruit is near harvest time.
Just make sure the squash itself still looks plump and healthy before you cut it.
4. Days to Maturity Have Passed
While not as precise as the physical signs, the days to maturity can guide your timing on when are Hubbard squash ready to pick.
Most Hubbard squash varieties need between 95 and 110 days from planting to reach full ripeness.
Check your seed packet for your specific variety and mark your calendar.
Once you hit that 100-day mark, start checking the skin hardness and stem color daily.
This helps you narrow down the window even if the weather has been a bit unusual that season.
How to Test If Your Hubbard Squash Is Ready to Pick
If you’re still unsure whether your Hubbard squash is ready to pick, performing a few simple tests can give you peace of mind.
These methods are used by gardeners everywhere to confirm harvest time.
The Fingernail Test
The fingernail test is the most common way to check if a Hubbard squash is ready to pick.
Take your thumbnail and gently press it into the skin of the squash.
If your nail bounces off without breaking the skin, your Hubbard squash is ready to pick.
If the skin gives way and you can pierce it, the squash needs more time on the vine.
The Sound Test
Some gardeners like to tap on the squash to see if it’s mature enough to pick.
A ripe Hubbard squash will produce a hollow, dull thud when you knock on it.
An underripe squash will sound more solid and high-pitched.
This test takes a bit of practice, but it’s a handy trick to add to your toolkit.
The Color Check
Hubbard squash come in different colors, from green to blue-gray to orange.
Regardless of the variety, the color should be deep and uniform when the squash is ready to pick.
Avoid picking Hubbard squash that still have a glossy, shiny appearance.
A dull, matte finish on the skin is a great indicator that your squash has matured fully.
What Happens If You Pick Hubbard Squash Too Early
Picking your Hubbard squash before it’s ready is a common mistake, but it’s not the end of the world.
An early-picked Hubbard squash may still be edible, but it won’t store well.
Because the skin hasn’t hardened, the squash will lose moisture quickly and may rot within a few weeks.
It also won’t have developed its full sweetness and rich, nutty flavor.
So if you get impatient and wonder if a Hubbard squash is ready to pick, just wait a bit longer if the signs aren’t there yet.
What If You Leave Hubbard Squash on the Vine Too Long
On the flip side, leaving your Hubbard squash on the vine too long can also create problems.
If a heavy frost hits while the squash is still on the vine, it can damage the fruit’s cells.
This can lead to soft spots and decay during storage.
Your goal is to pick your Hubbard squash before the first hard frost.
So even if the days to maturity aren’t quite up, it’s better to harvest if frost is forecasted.
You can always cure an early-picked squash, but you can’t undo frost damage.
So, When Are Hubbard Squash Ready to Pick?
Hubbard squash are ready to pick when their skin is too hard to dent, the stem has turned brown and corky, and the vine is dying back.
Those are the three most reliable signs that will never steer you wrong.
You can also count the days from planting, aiming for that 95 to 110 day mark for most varieties.
Once you’ve confirmed your Hubbard squash is ready to pick, cut it from the vine with sharp pruners.
Leave a several-inch stem attached and then cure the squash in a warm, dry spot for about two weeks.
This curing process will harden the skin even further for long-term storage.
After that, you can store your Hubbard squash in a cool, dark place for months of delicious eating.
Now you know exactly when are Hubbard squash ready to pick, so you can harvest at the perfect time every season.
Happy gardening and enjoy your homegrown Hubbard squash!