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You know potatoes are ready to pick when the plant’s foliage begins to yellow and die back, but the exact timing depends on whether you want new potatoes or full-sized storage spuds.
Potatoes are ready to pick at different stages, and knowing when potatoes are ready to pick means paying close attention to the plant above the soil and the days since planting.
It’s not a guessing game because the potato plant gives you clear signals that its underground treasures have reached the perfect harvest window.
In this post, we’ll break down the visual cues, the timing tricks, and the simple tests you can use to know when potatoes are ready to pick from your garden.
Let’s dig into the details so you can harvest potatoes at their absolute best.
Signs That Tell You When Potatoes Are Ready To Pick
Potatoes are ready to pick when the plant tells you it’s done, and here are the biggest indicators to watch for.
1. The Flower Test For Knowing When Potatoes Are Ready To Pick
For new potatoes, potatoes are ready to pick about two weeks after the plant starts flowering.
Those pretty white or purple flowers aren’t just for show because they signal that small, tender tubers are forming beneath the soil.
If you want those thin-skinned, early-season potatoes for salads or boiling, this flower stage is your green light.
You can gently dig around the base of the plant to check the size, and if they’re about the size of a golf ball, potatoes are ready to pick as new potatoes.
Just harvest a few at a time from each plant so the rest can keep growing.
2. Foliage Die-Back Means Potatoes Are Ready To Pick For Storage
For mature, storage-ready potatoes, potatoes are ready to pick when the foliage above ground starts to yellow and flop over.
This die-back is the plant’s way of saying the tubers have finished sizing up and the skins have started to set.
When about half to two-thirds of the leaves have turned yellow, that’s a strong signal that potatoes are ready to pick for long-term storage.
You don’t want to wait until every single leaf is brown and crispy, because that can invite rot in wet conditions.
But once you see that classic yellowing, give it another two weeks before you dig them all up.
3. Skin Firmness Confirms Potatoes Are Ready To Pick
The skin test is the most reliable physical check because potatoes are ready to pick when the skins are thick enough that they don’t rub off easily.
Gently dig out one test potato and rub your thumb across its skin.
If the skin peels or scrapes off with light pressure, the potato needs more time in the ground.
If the skin stays firmly attached and feels rough to the touch, potatoes are ready to pick and will store well without shriveling.
This is the key difference between new potatoes, which have paper-thin skins, and mature potatoes that can last for months in a cool pantry.
4. Days To Maturity Help You Predict When Potatoes Are Ready To Pick
Your seed packet or plant tag tells you roughly how many days until potatoes are ready to pick for your specific variety.
Early varieties like Yukon Gold are ready around 70 to 80 days after planting.
Maincrop varieties like Russet Burbank need 90 to 120 days before potatoes are ready to pick.
Keep a garden journal or set a calendar reminder so you know the expected window for your variety.
Then combine that timeline with the foliage and skin tests, and you’ll have a clear picture of when potatoes are ready to pick.
Best Time Of Day And Weather For Picking Potatoes
Potatoes are ready to pick on a dry day, and that timing matters more than you might think.
1. Pick Potatoes On A Dry Day
Harvesting in dry weather makes the job easier because the soil will crumble away from the tubers instead of clinging like heavy mud.
Wet soil can also make potatoes more prone to bruising and can introduce moisture that leads to rot during storage.
So wait for a sunny, dry day to confirm that potatoes are ready to pick and then get to work.
2. Morning Harvests Keep Potatoes Cool
Early morning is the ideal time because the soil is cool and the tubers haven’t been heated by the midday sun.
Hot potatoes are more likely to suffer from bruising and they cure less evenly.
So if you’ve been asking when potatoes are ready to pick, the answer includes picking them before the heat of the afternoon.
How To Dig Potatoes Without Damaging Them
Once you’ve confirmed potatoes are ready to pick, use the right digging technique to avoid slicing through your crop.
1. Use A Garden Fork Instead Of A Shovel
A digging fork is gentler on the tubers because it loosens the soil without cutting through potatoes like a sharp shovel blade can.
Insert the fork well away from the plant’s base, about 8 to 10 inches out, and lever the soil upward.
Then use your hands to feel around and pull out the potatoes you find.
This method helps you retrieve more of the harvest while keeping damage to a minimum.
2. Let Potatoes Cure Before Storing
After digging, don’t wash the potatoes because dirt actually helps protect them during curing.
Spread them out in a single layer in a dark, well-ventilated area with temperatures around 50 to 60°F for about two weeks.
This curing period thickens the skins and heals any small nicks so your potatoes store much longer.
Once cured, brush off loose soil and store them in a cool, dark, humid place.
Common Mistakes That Ruin A Potato Harvest
Even when potatoes are ready to pick, a few simple errors can turn your bounty into a mess.
1. Harvesting Too Early Leaves Small Potatoes
If you dig before the foliage yellows and the skins set, you’ll end up with tiny, immature tubers that won’t store.
You might get delicious new potatoes, but if you were after bigger baking spuds, you’ll be disappointed.
So resist the urge to dig everything up just because you’re excited.
2. Waiting Too Long After Foliage Dies
If you leave mature potatoes in wet soil for too long after the foliage has completely died, they can start to rot or sprout.
Once potatoes are ready to pick and the plant is fully dead, aim to harvest within a few weeks.
So, How Do You Know When Potatoes Are Ready To Pick?
You know potatoes are ready to pick by watching the foliage, counting the days, and checking the skin firmness of a test tuber.
Potatoes are ready to pick as new potatoes when the plants flower, or as mature storage potatoes when the leaves yellow and the skins resist rubbing.
Dig on a dry morning, use a fork, and cure your harvest properly for the best flavor and longest shelf life.
So now that you know exactly when potatoes are ready to pick, head out to your garden and trust those plant signals.
Your perfect potato harvest is closer than you think.