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Rhubarb is ready to be picked when its stalks are firm, vibrant in color, and have reached a length of at least 12 to 18 inches.
Knowing when rhubarb is ready to be picked isn’t complicated, but it does come down to a few simple visual and tactile clues you need to watch for.
If you’ve been asking yourself when is rhubarb ready to be picked, the short answer is that you can start harvesting in early spring, usually about two years after planting, and continue through mid-summer.
The exact timing when rhubarb is ready to be picked depends on your climate, the variety you’re growing, and how much energy the plant has stored from previous seasons.
In this post, we’ll break down everything you need to know about when rhubarb is ready to be picked, how to tell if it’s truly ready, and the best harvesting techniques.
Let’s dig into the details so you can enjoy that perfect tart stalk.
When Is Rhubarb Ready To Be Picked: The Key Signs
When rhubarb is ready to be picked, there are several telltale signs that you can rely on every single season.
Once you know these signals, you’ll never accidentally harvest too early or leave stalks to become tough and woody.
Here are the main indicators that rhubarb is ready to be picked for the best flavor and texture.
1. Stalk Length and Thickness
The most obvious clue that rhubarb is ready to be picked is when the stalks have grown to at least 12 inches long or even up to 18 inches.
Thickness matters too, as slender stalks can be stringy, while overly thick stalks might be past their prime.
A good rule of thumb is to aim for stalks that are about the width of your index finger or slightly thicker.
When rhubarb is ready to be picked at that size, it will be tender enough to use in pies, jams, and sauces without much effort.
2. Color Development
Color is another clear signal that rhubarb is ready to be picked, but it depends on the variety you’re growing.
Some rhubarb types turn a deep crimson red when they’re ready, while others stay mostly green with just a hint of pink at the base.
Don’t wait for full redness if your variety is naturally green, as that means you’ll miss the window when rhubarb is ready to be picked.
Instead, focus on the color being rich and consistent, as dull or pale stalks are often a sign of under-development.
3. Firmness and Snap Test
When you gently squeeze a stalk, rhubarb that is ready to be picked will feel firm and crisp rather than spongy or soft.
If you bend a stalk slightly, it should have a bit of give before snapping cleanly, much like celery.
A tough, fibrous stalk that resists bending is a sign it’s gone too long, while a mushy one means it’s past its best.
So, when rhubarb is ready to be picked, the stalk will feel solid and break with a satisfying snap.
4. Leaf Development and Health
The leaves themselves also tell you when rhubarb is ready to be picked.
Once the leaves have fully unfurled and reached a good size, typically 6 to 8 inches across, the plant has enough energy to support harvesting.
If the leaves are still small and curled, your rhubarb isn’t ready to be picked yet, so patience is key.
Healthy, deep-green leaves indicate that the roots are strong and that the stalks have accumulated plenty of sugars.
Best Time of Year When Rhubarb Is Ready To Be Picked
You might wonder if there’s a specific calendar date when rhubarb is ready to be picked, and the truth is it varies.
Generally, rhubarb starts being ready in April or May, depending on your hardiness zone and the weather patterns that spring.
The harvest window when rhubarb is ready to be picked typically lasts for about 8 to 10 weeks, ending by late June or early July.
After that, you should stop picking to let the plant rebuild its energy reserves for next year’s crop.
Here are some seasonal tips for figuring out exactly when rhubarb is ready to be picked in your garden.
1. First-Year Growth Isn’t Ready
If you planted rhubarb this season, your rhubarb is not ready to be picked at all, no matter how big the stalks look.
Young plants need their first full year to establish deep roots and store carbohydrates for future harvests.
During year one, leave every stalk alone so the plant can mature properly.
Starting in year two, you can begin light harvesting, taking only a few stalks when rhubarb is ready to be picked.
2. Morning Harvests Are Best
The best time of day when rhubarb is ready to be picked is in the early morning when the plant is fully hydrated.
Overnight, the stalks absorb moisture, which makes them crisp and juicy rather than limp or dry.
So head out to the garden before the sun gets intense, and you’ll get the freshest stalks possible.
Even if your rhubarb is ready to be picked in the afternoon, early morning is still ideal for the best quality.
3. Weather Impacts Ripeness Speed
Cool, cloudy springs slow down growth, meaning rhubarb is ready to be picked later than usual.
Warm, sunny weather speeds things up, so you might see ready stalks sooner than expected.
Keep an eye on your local forecast and simply observe your plant’s progress rather than relying on a fixed date.
When rhubarb is ready to be picked, you’ll notice growth spurts after rain followed by warm days.
How To Properly Harvest Rhubarb When It’s Ready
Now that you know when rhubarb is ready to be picked, you need to learn the correct way to remove the stalks without damaging the plant.
Harvesting incorrectly can expose the crown to disease or reduce future yields, so follow these steps carefully.
1. Always Remove Leaves Immediately
The leaves of rhubarb are toxic to humans and pets, as they contain high levels of oxalic acid.
Once you’ve confirmed rhubarb is ready to be picked, snap the stalk off at the base.
Then, immediately cut the leaf off and discard it in your compost or trash, as it should never be eaten.
This also prevents the leaves from drawing moisture out of the stalk after harvest.
2. Pull, Don’t Cut, for Healthier Plants
When rhubarb is ready to be picked, the best method is to grip the stalk near the bottom and gently twist it.
Pull the stalk away from the crown with a sideways motion, and it should detach cleanly.
This pulling technique encourages new growth, while cutting with a knife can leave stubs that rot.
Always harvest only about one-third of the stalks at a time to keep the plant vigorous.
3. Stop Harvesting When Stalks Get Thin
As the season progresses, you’ll notice the new stalks becoming thinner and spindlier.
That’s your signal that rhubarb is no longer ready to be picked and that you should stop harvesting.
Thin stalks are a sign the plant is exhausted and needs to focus on storing energy for winter dormancy.
When rhubarb is ready to be picked no more, let it leaf out fully and grow untouched until fall frost.
Common Mistakes When Figuring Out When Rhubarb Is Ready To Be Picked
Even experienced gardeners sometimes miscue when it comes to judging when rhubarb is ready to be picked.
To help you avoid frustration, here are the most common pitfalls and how to steer clear of them.
1. Harvesting After a Heavy Bolt
If your rhubarb sends up a tall flower stalk, that’s called bolting, and it changes the plant’s energy focus.
Once bolting happens, the stalks can become tough and bitter, even if they look like rhubarb is ready to be picked.
It’s best to remove the flower stalk as soon as you see it, which redirects energy back into the edible stalks.
After a significant bolt, test a stalk’s firmness and taste before harvesting a large batch.
2. Picking Too Many Stalks at Once
Even when rhubarb is ready to be picked, you should never strip the plant bare.
Overharvesting in a single session weakens the crown and can stress the plant for years.
Always leave at least half of the stalks on the plant so it can keep photosynthesizing.
A good rule is to harvest for two to three weeks, then give the plant a break.
3. Waiting for Perfect Summer Size
Some gardeners wait too long, thinking bigger is better, but you can overgrow rhubarb.
If you leave stalks until midsummer, they often become woody and fibrous, losing their bright tartness.
So, when rhubarb is ready to be picked in spring, don’t delay just because it seems small at first glance.
Early harvests are often the most tender and flavorful, so enjoy them while they’re young.
So, When Is Rhubarb Ready To Be Picked?
Rhubarb is ready to be picked when the stalks are firm, at least 12 inches long, and the leaves are fully developed.
You’ll know rhubarb is ready to be picked by checking color, giving it a gentle squeeze, and performing a snap test.
The harvest season typically starts in April or May and lasts until early July, depending on your climate.
Rhubarb is ready to be picked once the plant is at least two years old, so be patient with first-year plantings.
And remember to stop harvesting when new stalks emerge thin, as that means the plant needs a rest.
By following these simple signs, you’ll always know when is rhubarb ready to be picked for pies, jams, and sauces.
Happy harvesting, and enjoy that sweet-tart reward from your garden.