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Potato plants are ready to pick when the foliage begins to yellow and die back naturally, which signals that the tubers beneath the soil have reached maturity.
If you’ve been wondering when are potato plants ready to pick, the short answer is that timing depends on the variety you planted and whether you want new potatoes or full-sized storage potatoes.
Potato plants are ready to pick for fresh eating about two to three weeks after the plants flower, but for larger, storable spuds, you’ll want to wait until the tops have completely died down.
Knowing when are potato plants ready to pick isn’t just about the calendar, it’s about reading the signals your plants give you so you don’t harvest too early or too late.
In this post, we’ll dig into the exact signs that tell you when potato plants are ready to pick, how to test a few hills, and what to do after you lift those treasures from the ground.
Let’s uncover the secrets to perfect potato harvests together.
Understanding When Potato Plants Are Ready To Pick
The clearest answer to when are potato plants ready to pick comes from watching the plant’s above-ground growth, because the foliage is your window into what’s happening underground.
Potato plants are ready to pick when the stems start to flop over and the leaves turn from vibrant green to a faded yellow or brown, which usually happens 90 to 120 days after planting for maincrop varieties.
Early-season potatoes might be ready in as little as 60 days, so knowing your specific variety’s days-to-maturity is crucial for predicting when potato plants are ready to pick in your garden.
1. Flowering Signals the First Harvest Window
When your potato plants produce flowers, that’s the first visual clue that small, tender new potatoes are forming just beneath the soil.
Potato plants are ready to pick for new potatoes about two weeks after those blossoms appear, and you can gently scratch away soil to check the size of the tubers.
If you’re growing early varieties like Yukon Gold or Red Norland, this flowering stage is your green light that potato plants are ready to pick for that sweet, thin-skinned treat.
Don’t pull the whole plant though, just reach in and harvest a few baby spuds, then let the rest keep growing for later.
2. Yellowing Foliage Indicates Maturity
The most reliable answer to when are potato plants ready to pick for storage is when about half of the foliage has turned yellow and begun to die back.
Potato plants are ready to pick when the lower leaves start yellowing because the plant is shifting its energy from leaf production down to the tubers, bulking them up and thickening their skins.
This yellowing phase typically starts around two to three weeks after flowering for mid-season varieties, so mark your calendar from blossom time to get a better estimate.
At this stage, you can cut the tops off and wait another two weeks before digging, which forces the skins to set and makes your potatoes last longer in storage.
3. Completely Dead Tops Mean Full Maturity
Potato plants are ready to pick for long-term storage when the vines have completely died back and turned brown and crispy, not just yellowed at the edges.
When the foliage is fully dead, the tubers have stopped growing, and their skins have cured naturally in the soil, giving them that protective barrier against rot and bruising.
If you’re unsure whether potato plants are ready to pick, wait a full two weeks after the stems have collapsed, because those extra days make a huge difference in skin set.
Potato plants are ready to pick at this point for any variety, whether you grew russets for baking or fingerlings for roasting, the dead vines tell you the underground work is done.
4. Soil Temperature and Weather as Timing Cues
Potato plants are ready to pick when soil temperatures are between 60 and 70°F, as this range promotes proper skin thickening without triggering sprouting or decay.
If a hard frost is forecast and your potato plants still have green tops, you’ll need to harvest immediately because cold damage can turn tubers mushy and unappealing.
Potato plants are ready to pick earlier than expected in wet seasons, because excess moisture can cause rot in the ground, so don’t hesitate to dig if heavy rains are coming.
On the flip side, potato plants are ready to pick later if you’ve had a cool, dry summer, since growth slows down and the foliage takes longer to senesce naturally.
How To Test If Potato Plants Are Ready To Pick
If you’re still unsure when potato plants are ready to pick, the most practical method is to dig up a “test hill” and examine the actual tubers before committing to a full harvest.
Here’s how you can confirm potato plants are ready to pick without guessing:
1. Dig a Sample Hill Early
Choose a plant that’s showing yellowing foliage and gently lift it with a garden fork, keeping a few inches away from the stem to avoid spearing any potatoes.
Brush off the soil and check the skins, if they rub off easily with your thumb, the potato plants are ready to pick for immediate eating, but not yet for storage.
Potato plants are ready to pick for keeping when the skins are firmly attached and don’t peel away when you lightly scrape them with a fingernail.
If the tubers look too small or the skins are paper-thin, just rebury them and wait another week, then test another hill.
2. Check the Size of the Tubers
Potato plants are ready to pick when the tubers have reached a usable size for your recipes, which depends on whether you prefer petite new potatoes or hefty bakers.
For new potatoes, you want tubers that are about one to two inches in diameter, and potato plants are ready to pick for that size right after flowering.
For full-sized storage potatoes, you’re looking for tubers that are three to four inches long, and potato plants are ready to pick when they hit that benchmark in late season.
Keep in mind that larger tubers don’t always mean better flavor, so harvest based on your meal plans rather than just maximum size.
3. Perform the Squeeze Test
Potato plants are ready to pick when you gently squeeze a tuber and it feels firm and solid without any give or soft spots, which indicates mature, healthy flesh.
Immature potatoes tend to feel slightly spongy because they’re still full of water and haven’t converted their starches yet, so potato plants are ready to pick when that sponge feel disappears.
If the potato feels rock-hard and the skin is smooth and unblemished, you’ve hit the sweet spot where potato plants are ready to pick for the best texture and taste.
Don’t confuse firmness with bruising, though, so always dig carefully and inspect for any cuts or dark spots before declaring your harvest ready.
What Happens After Potato Plants Are Ready To Pick
Once you’ve confirmed potato plants are ready to pick, the next steps are all about curing, storing, and enjoying your hard-earned bounty without wasting a single spud.
Potato plants are ready to pick, but the tubers aren’t instantly ready for the pantry, they need a curing period to seal their skins and heal any harvest wounds.
1. Cure Your Potatoes for Longevity
After you lift the tubers, leave them on the soil surface for a couple of hours to dry off any excess moisture, but never leave them in direct sunlight for long.
Then move them to a dark, well-ventilated area with temperatures around 50 to 60°F and high humidity for about two weeks, which allows the skins to toughen up.
Potato plants are ready to pick, and once cured, those potatoes can last for months in a cool, dark, dry spot like a cellar or a closet.
Check your cured potatoes regularly and remove any that show signs of rot or sprouting so they don’t spoil the rest of your stash.
2. Store in a Dark, Cool Place
Potato plants are ready to pick, but proper storage is what keeps those tubers fresh, so aim for temperatures between 45 and 50°F with good airflow.
Avoid storing potatoes near onions or apples, as these release ethylene gas that can cause early sprouting, undoing all your careful timing.
Keep them in a breathable container like a burlap sack or a cardboard box with holes, and never seal them in plastic bags that trap moisture and encourage mold.
Potato plants are ready to pick now, and with these storage tips, you’ll be enjoying your homegrown spuds well into the winter months.
3. Enjoy the Fruits of Your Labor
Potato plants are ready to pick, and the best part is that you get to savor the rewards of your patience in the garden with meals that taste infinitely better than store-bought.
Try roasting your harvested potatoes with olive oil and rosemary, or boiling them for a creamy mashed potato side dish that highlights their fresh, earthy flavor.
Potato plants are ready to pick, and every single tuber you harvest carries the joy of watching them grow from tiny seed potatoes to a full, abundant crop.
Share your surplus with neighbors or preserve them by canning or freezing, so nothing goes to waste after you’ve worked so hard to time the harvest perfectly.
So, When Are Potato Plants Ready To Pick?
Potato plants are ready to pick when the foliage yellows and dies back, which is your plant’s natural way of saying the tubers have reached their prime.
Potato plants are ready to pick for new potatoes about two weeks after flowering, while maincrop varieties need 90 to 120 days and fully dead vines for storage-quality spuds.
The best way to be certain when potato plants are ready to pick is to test a sample hill and check for firm tubers with skins that don’t rub off easily.
Potato plants are ready to pick for immediate meals once the skins are set, and for long-term storage once you’ve cured them properly in the right conditions.
So keep an eye on your plants, trust the signals they give you, and you’ll never have to wonder when potato plants are ready to pick again.
Happy digging, and may your harvest be as bountiful as your patience has been!