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Potato plants are ready to pick when the foliage has completely died back and the skins have had time to set.
That’s the short answer, but knowing exactly when to harvest can make the difference between thin-skinned spuds and storage-ready perfection.
If you’ve been wondering when are potato plants ready to pick, you’ll be glad to know the timing is all about watching the plant’s above-ground growth.
Potato plants are ready to pick at different stages depending on whether you want new potatoes or mature ones.
In this post, we’ll walk through the signs that tell you potato plants are ready to pick, how to test for readiness, and the best harvesting methods for a great crop.
Let’s dig in.
When Are Potato Plants Ready To Pick For Mature Tubers
Potato plants are ready to pick for mature storage potatoes about two to three weeks after the vines have died back completely.
The dying foliage is the most reliable signal that the tubers beneath the soil have finished growing.
Here’s what you should look for to know potato plants are ready to pick for the main harvest.
1. The Foliage Has Turned Yellow And Collapsed
Potato plants that are ready to pick will start looking tired and ragged.
The leaves turn yellow, then brown, and eventually the stems flop over and dry out.
This isn’t a sign of disease; it’s the plant telling you it has channeled all its energy into the potatoes below.
Once about 80% of the foliage has died back, your potato plants are ready to pick.
That remaining 20% of green growth will continue sending a little energy to the tubers over the next week or two.
2. The Skin Has Set Firmly
Potato plants are ready to pick when the skins have thickened enough to resist gentle rubbing.
If you harvest too early, the skins are paper-thin and will scrape off easily.
Those thin-skinned potatoes are fine for eating right away but won’t store well.
To test, gently brush away soil from one tuber and rub it with your thumb.
If the skin stays put, your potato plants are ready to pick.
If it slips off, give them more time in the ground, provided the soil isn’t waterlogged.
3. The Weather And Soil Conditions Align
Potato plants are ready to pick when the soil is dry enough that you can dig without making a muddy mess.
Wet soil clings to the tubers and makes them heavy and harder to handle.
Aim to harvest on a dry, sunny day after the soil has had a few days to drain.
If you’re expecting heavy rain, it’s better to harvest a little early than to let the tubers sit in soggy ground.
Wet conditions can cause rot and invite diseases into the tubers.
How Early Can Potato Plants Be Ready To Pick As New Potatoes
Potato plants are ready to pick as new potatoes much earlier, usually about two to three weeks after the plants flower.
New potatoes are small, tender, and have thin skins that don’t need to be peeled.
If you love that fresh, buttery flavor, this is the stage to aim for.
Here’s how to know potato plants are ready to pick for this early harvest.
1. Look For Flower Buds And Open Blooms
Potato plants that are ready to pick as new potatoes will show flower buds, and in many varieties, open blossoms.
Once you see flowers, the tubers have started forming and will be about the size of a golf ball or slightly larger.
You can start harvesting a couple of weeks after bloom time begins.
Not every potato variety flowers reliably, so use bloom as a guide rather than a strict rule.
2. Your Growing Calendar Points To 60 To 90 Days
Potato plants are ready to pick as new potatoes roughly 60 to 90 days after planting, depending on the variety.
Early varieties like Yukon Gold or Red Norland may be ready closer to the 60-day mark.
Maincrop varieties might need a full 90 days or more to produce decent new potatoes.
Check your seed packet for the expected days to maturity, but don’t be afraid to do a test dig.
A quick check of one plant tells you much more than a calendar ever could.
3. The Tubers Are Small And Skins Are Delicate
Potato plants that are ready to pick as new potatoes will yield small, round tubers with very thin skins.
You can rub the skin off easily with your finger, which is perfectly fine for immediate eating.
New potatoes don’t need any curing time, so you can cook them right after cleaning.
Keep in mind this early harvest reduces your overall yield, so only pull what you’ll eat within a few days.
Signs Potato Plants Are Ready To Pick But You Missed The Window
Potato plants are ready to pick within a specific window, but life gets busy.
Sometimes you check the patch and find the foliage completely dried out and the soil cracking.
The good news is potato plants are ready to pick even when they’ve been sitting for a few extra weeks.
Tubers will stay fine in the ground as long as the soil doesn’t freeze or stay too wet.
1. The Skin Is Thick And Durable
Potato plants that have been left past the ideal harvest time will have very thick, tough skins.
That’s not a bad thing for storage, as it means excellent keeping quality.
The flesh should still be firm, not soft or spongy.
If you squeeze a tuber and it gives slightly, it might be past its prime.
But firm tubers from over-mature plants are perfectly fine to eat and store.
2. Sprouts May Appear On The Tubers
Potato plants that are ready to pick and then left too long in warm, damp soil may start sprouting.
Small white or green buds on the skin are a sign the tubers are breaking dormancy.
Those sprouted potatoes are still edible once you remove the sprouts, but they’ll have a slightly different flavor.
To limit sprouting, harvest as soon as the foliage dies back in your climate.
3. Soil Temperature Starts Dropping
Potato plants are ready to pick before the soil temperature drops below 50°F (10°C).
Cold soil can convert starches to sugars, which makes potatoes taste sweet and darken when cooked.
If you’ve missed the ideal window, aim to dig before the first hard frost.
You can still store those cold-affected potatoes, but they won’t fry up as nicely.
How To Harvest Once Potato Plants Are Ready To Pick
Potato plants are ready to pick, and the harvest method matters almost as much as the timing.
Careful digging prevents bruising and cuts that invite rot.
Here’s a simple process to get your potatoes out of the ground without damage.
1. Use A Garden Fork Or Spade With Care
Start by loosening the soil about a foot away from the plant’s base.
Push the fork or spade in at an angle and lift the soil upward gently.
Avoid digging straight down into the center of the plant, as that’s where the most tubers are clustered.
Work your way around the root zone in a circle to free the potatoes from the soil.
2. Hand-Sift Through The Soil
Once you’ve loosened the ground, use your hands to sift through the soil and gather the potatoes.
Gloves are a good idea because the soil can be rough on your skin.
Don’t toss the spuds into a bucket from a height, as that can cause bruising.
Gently place each tuber into a basket or crate lined with newspaper.
3. Cure The Potatoes For Storage
Potato plants are ready to pick, but your mature potatoes aren’t ready for the pantry just yet.
Cure them by keeping them in a dark, well-ventilated spot with temperatures around 50–60°F (10–15°C) and high humidity for about two weeks.
This allows any small cuts or bruises to heal and thickens the skins further.
After curing, brush off any loose soil and store them in a cool, dark place at about 40–45°F.
So, When Are Potato Plants Ready To Pick?
Potato plants are ready to pick when the foliage dies back for mature tubers, or about two weeks after flowering for new potatoes.
That’s the straightforward answer, and it applies to nearly all varieties you’ll grow at home.
Potato plants are ready to pick when you can gently rub the skin and it doesn’t scrape off easily.
And potato plants are ready to pick before the soil gets cold or soggy, so keep an eye on the forecast.
We hope this guide helps you pinpoint the exact moment your potato plants are ready to pick.
Happy harvesting.