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Kohlrabi is ready to be picked when the bulb reaches about 2 to 3 inches in diameter, typically 45 to 60 days after planting.
That’s the sweet spot where you’ll know kohlrabi is ready to be picked for the best flavor and texture.
If you’ve been wondering when is kohlrabi ready to be picked in your garden, the answer comes down to size, timing, and a few simple visual cues.
You don’t need fancy tools or guesswork, just a keen eye and a willingness to check your plants regularly.
In this post, we’ll dig into exactly when is kohlrabi ready to be picked, how to tell if kohlrabi is ready to be picked without cutting it open, and what happens if you leave it in the ground too long.
Let’s get growing and harvest that crunchy, mild bulb at its prime.
When Is Kohlrabi Ready To Be Picked: The Simple Size Rule
When is kohlrabi ready to be picked more often than not comes down to the size of that swollen stem, which we call the bulb.
The bulb is the part you eat, and it grows above the soil line, looking like a funny little alien turnip with leafy stalks sprouting from the sides.
For most varieties, kohlrabi is ready to be picked once that bulb is between 2 and 3 inches across, roughly the size of a tennis ball or a baseball.
At this size, the flesh is crisp, juicy, and slightly sweet, making it perfect for snacking raw or tossing into slaws.
If you’re growing a giant variety like “Gigante,” you can let it go a bit bigger, but you’ll still want to harvest before it gets woody.
Check the Calendar: Days to Maturity
Knowing when is kohlrabi ready to be picked also starts with your seed packet, which lists days to maturity.
Most kohlrabi varieties mature in 45 to 60 days from transplanting, and a little faster if you direct-sowed seeds in cooler spring weather.
If you planted in early spring, start checking around day 45, as warm temperatures can speed things up.
For fall crops, growth slows down, so kohlrabi may be ready to be picked closer to day 60 or even 70.
Mark your calendar as a rough guide, but always rely on the physical signs below before you pull.
Feel the Bulb Firmness
A reliable way to know kohlrabi is ready to be picked is to give the bulb a gentle squeeze.
When it’s ready, the bulb should feel rock-solid and dense, like a firm apple, with no give at all.
If the bulb feels spongy or soft, that’s a signal you’ve waited too long, and the inside is likely turning pithy and tough.
On the flip side, if the bulb is still very small and skinny, it needs more time, so be patient.
That firmness tells you the kohlrabi is ready to be picked and will have that satisfying crunch you’re after.
Look at the Leaves and Stalks
The foliage gives away a lot about whether kohlrabi is ready to be picked.
When the bulb approaches harvest size, you’ll notice the leaves are still vibrant and green, not yellowing or wilting.
The leaf stalks should be thick and sturdy, attached firmly to the bulb.
If you see the lower leaves starting to yellow or droop, that’s a sign the plant is past its peak, so you should harvest immediately.
Healthy, perky leaves mean the kohlrabi is ready to be picked now and will store well after harvest.
Signs That Kohlrabi Is Overripe and Past Its Prime
Knowing when is kohlrabi ready to be picked also means recognizing when it’s too late, because overripe kohlrabi is a sad, woody disappointment.
If you leave the bulb in the ground beyond its ideal size, it will continue to swell and eventually split.
Once kohlrabi is ready to be picked and you ignore that window, the flesh becomes fibrous, tough, and bland, losing all its lovely sweetness.
You might also notice the skin getting thicker and more ridged, which is another clear warning sign.
Don’t let that happen, because a 5-inch monster bulb might look impressive but will taste like chewing on a tree branch.
What Happens If You Wait Too Long?
When kohlrabi is overripe, the interior starts forming a woody core that’s nearly impossible to eat raw.
Even cooking won’t save it, as those fibrous strands remain chewy and unpleasant.
The plant’s energy shifts from bulb development to producing flower stalks, which also changes the flavor for the worse.
So if you spot a flower stalk emerging, that kohlrabi is definitely not ready to be picked for good eating, it’s already gone.
The good news is you can still compost it or let it flower for pollinators, but don’t expect a tasty harvest from that one.
How to Harvest Kohlrabi Once It’s Ready
Once you’ve determined kohlrabi is ready to be picked, harvesting is a quick and satisfying job.
Use a sharp knife or garden shears to cut the stem just below the bulb at soil level.
You can also grasp the base and give a firm twist, but cutting is cleaner and avoids damaging nearby roots.
After you pull it, trim off the leaves and stalks, leaving about an inch of stem attached to the bulb.
The leaves are actually edible too, so don’t toss them, you can sauté them like collard greens.
Rinse off any dirt, and your kohlrabi is ready to be picked, cleaned, and stored in the fridge for up to a few weeks.
Best Time of Day for Harvesting
For the freshest, crispest kohlrabi, plan to harvest in the early morning.
At that time, the plants are fully hydrated from the night, so the bulbs are extra juicy and firm.
Avoid harvesting during the hot afternoon, as the bulbs can be slightly wilted and less crisp.
If you must harvest later in the day, dunk the bulbs in cold water immediately to refresh them.
Morning harvests also help the kohlrabi is ready to be picked and then stored longer without losing moisture.
So, When Is Kohlrabi Ready To Be Picked For The Best Harvest?
Kohlrabi is ready to be picked when the bulb is 2 to 3 inches across, firm to the touch, with healthy green leaves.
That size window typically falls between 45 and 60 days after planting, depending on your variety and growing conditions.
Check your plants every couple of days once they near that size, as kohlrabi can go from perfect to overripe surprisingly fast.
If you’re still unsure when is kohlrabi ready to be picked, just err on the side of harvesting a bit early, as smaller bulbs are tender and delicious.
So keep an eye on those bulbs, feel for firmness, and you’ll enjoy kohlrabi at its absolute best all season long.
Happy harvesting, and here’s to crunchy, sweet kohlrabi straight from your garden.