How Do You Know When To Pick A Potato

You know when to pick a potato by watching for the right signs in the plant and the soil, and timing your harvest around the potato’s growth stage.

 

If you’ve been wondering how do you know when to pick a potato, the answer comes down to a few simple visual and tactile clues that any gardener can spot.

 

Knowing when to pick a potato is all about deciding whether you want new potatoes or mature storage potatoes, because each type has a different perfect harvest moment.

 

In this post, we’ll break down how to tell when to pick a potato, what happens if you wait too long, and the best techniques for digging them up without damage.

 

Let’s dig in and get your spuds out of the ground at exactly the right time.

 

How Do You Know When To Pick A Potato: The Key Signs

The clearest way to know when to pick a potato is to look at the plant above the ground, because the foliage tells you exactly what’s happening below.

 

When potato plants start to flower, that’s your first signal that small new potatoes are forming and ready for early harvest.

 

But if you want full-sized potatoes for storage, you’ll need to wait until the flowers fade and the leaves begin to yellow and die back.

 

This dying-back process is the most reliable indicator for when to pick a potato for a mature crop.

 

1. Watch For Flowering To Pick New Potatoes

When you see the first blossoms appear on your potato plants, it means the tubers underneath have started to form.

 

At this stage, you can gently reach into the soil and feel for potatoes that are about the size of a golf ball or slightly larger.

 

Those are called new potatoes, and they have thin skins that don’t store well, so you’ll want to eat them within a few days.

 

If you’re wondering when to pick a potato for that fresh, tender taste, flowering time is your cue.

 

2. Look For Yellowing Foliage For Mature Potatoes

For mature potatoes with thicker skins that can last through winter, you need to wait for the plant’s leaves to turn yellow and start to flop over.

 

This usually happens two to three weeks after flowering, and it’s the classic sign for when to pick a potato for storage.

 

Once about half the foliage has yellowed, the potatoes have stopped growing and are now setting their skins.

 

If you harvest too early at this stage, the skins will be fragile and prone to bruising and rot.

 

3. Check The Soil And Weather Conditions

The best time to pick a potato is on a dry day when the soil is crumbly and not waterlogged.

 

If the ground is too wet, the potatoes will come out muddy and heavy, and they’ll be harder to cure properly.

 

Before you dig, do a quick test by pulling back some soil with your hands.

 

If the potatoes are still clinging tightly to the plant and feel small, give them more time.

 

But if they easily separate and feel firm, that’s your answer for when to pick a potato from that particular plant.

 

4. The Skin Rub Test Is The Final Proof

Here’s the most hands-on way to know when to pick a potato: gently rub your thumb across the skin of a potato you’ve uncovered.

 

If the skin rubs off easily, the potato isn’t mature yet and needs more time in the ground.

 

If the skin stays firmly attached and doesn’t scrape off, then the potato is fully mature and ready to harvest.

 

This simple test is the most reliable answer to how do you know when to pick a potato, because it’s a direct measurement of the potato’s readiness.

 

What Happens If You Pick Potatoes Too Early Or Too Late

Getting the timing right for when to pick a potato is important because digging at the wrong time can ruin your whole harvest.

 

If you pick potatoes too early, you’ll get small tubers with paper-thin skins that won’t cure or keep for long in storage.

 

They’ll still taste delicious as new potatoes, but you’ll miss out on the larger yields and long shelf life of mature spuds.

 

On the flip side, if you wait too long to know when to pick a potato, the tubers can start to sprout, rot, or get eaten by pests in the soil.

 

Extreme heat can also cause potatoes to become tough and bitter if left in the ground past their prime.

 

That’s why it’s better to harvest a little early and cure them properly than to leave them in the soil and risk losing the whole crop.

 

A Quick Note On Curing Potatoes After Harvest

Once you’ve figured out when to pick a potato and have dug them all up, you need to cure them before storage.

 

Curing means letting the potatoes sit in a dark, dry, and well-ventilated place for about two weeks.

 

This hardens the skins, heals any nicks from the fork or shovel, and prepares them for long-term storage.

 

After curing, brush off the excess soil, but don’t wash them, as moisture can lead to rot.

 

Store cured potatoes in a cool, dark spot around 45–50°F, and they can last for several months.

 

So, How Do You Know When To Pick A Potato?

You know when to pick a potato by watching the plant’s flowers and foliage, checking the soil, and testing the skin’s firmness.

 

For new potatoes, pick them right after flowering for tender, thin-skinned spuds.

 

For mature storage potatoes, wait until the leaves yellow and die back, then do the skin rub test to confirm.

 

The best time to pick a potato is on a dry day, and if the skins stay firm when rubbed, you’re good to dig.

 

So now you know how do you know when to pick a potato, and you can head out to your garden with confidence and harvest a perfect batch every time.