When Are Spring Onions Ready To Pick

Spring onions are ready to pick when they reach about the thickness of a pencil, which usually happens around 60 to 90 days after planting.
 
But honestly, you can start harvesting spring onions even earlier if you want a milder, more delicate flavor.
 
If you’ve been wondering when are spring onions ready to pick in your garden, the answer really comes down to the size of the bulb and the look of the green tops.
 
Knowing when are spring onions ready to pick is one of those little gardening skills that makes a huge difference in taste and texture.
 
Spring onions are ready to pick when the stems look plump and the white base has started to swell just a bit, but before it forms a big onion bulb.
 
In this post, we’ll dig into the exact signs that tell you when are spring onions ready to pick, plus how to harvest them for the best results.
 
Let’s get those green tops out of the soil and into your kitchen.
 

When Are Spring Onions Ready to Pick? The Key Signs to Look For

So when are spring onions ready to pick, exactly?
 
The timing depends on a few clear visual clues, and once you know them, you’ll never second-guess yourself again.
 
Spring onions are ready to pick when the plant has had enough time to develop that signature mild bite, but not so long that it turns into a strong onion.
 
Here are the most reliable signs that your spring onions are ready to pick.
 

1. The Pencil-Thickness Rule

The very first sign that spring onions are ready to pick is the diameter of the stem at the base.
 
Once the stem measures roughly between a quarter and a half inch wide, similar to the thickness of a pencil, spring onions are ready to pick.
 
That thickness means the plant has stored enough energy to give you a crisp, juicy bite without becoming fibrous.
 
If you wait much longer, the stem can get thicker and start to form a real onion bulb, which changes the texture and flavor profile.
 
So if you’re checking when are spring onions ready to pick, grab a pencil from your desk and compare sizes.
 
It’s a quick and easy method that works every single time.
 

2. The Green Tops Reach 8 to 12 Inches

The leafy green tops are another huge giveaway for when spring onions are ready to pick.
 
Spring onions are ready to pick when the green shoots stand tall and reach anywhere from 8 to 12 inches above the soil line.
 
At this height, the tops should look vibrant and upright rather than floppy or yellowing at the tips.
 
If the leaves are still short and spindly, the plant isn’t mature enough yet.
 
But if they’ve shot up and look like a cheerful clump of grass, your spring onions are ready to pick without any doubt.
 
The tops also give you a clue about the bulb underneath, a healthy top usually means a healthy root system.
 

3. The Bulb Base Shows a Slight Swell

As spring onions mature, the white portion just above the roots will start to swell slightly, but it shouldn’t round out like a pearl onion.
 
When you notice that subtle bump, spring onions are ready to pick for that perfect balance of onion flavor and sweetness.
 
If the bulb looks like a flat white stick with no swell at all, they might need a few more days in the ground.
 
If the swell has turned into a ball shape, you’ve waited too long, and you’re now dealing with a young bulb onion.
 
So keep an eye on that base to know exactly when are spring onions ready to pick.
 

4. Days to Maturity Based on Variety

Most spring onion varieties are ready to pick about 60 days after sowing seeds directly into the garden.
 
If you started from transplants or sets, that window shrinks to around 30 to 40 days, and your spring onions are ready to pick much sooner.
 
Check the back of your seed packet because some varieties, like White Lisbon or Evergreen Hardy White, have slightly different maturation windows.
 
Just remember that these day counts are a guideline, not a hard rule, so you still need to look at the physical signs we talked about above.
 
But knowing the expected harvest window helps you plan when to start checking if spring onions are ready to pick.
 

How to Test if Spring Onions Are Ready to Pick Without Pulling Them

If you’re not quite sure whether spring onions are ready to pick, you can do a quick check without ruining the plant.
 
Gently brush away a bit of soil around the base of one onion to inspect the stem width and bulb swell.
 
You can also gently tug on the green tops, if you feel slight resistance but they don’t snap, that’s a good sign spring onions are ready to pick.
 
But the most foolproof way is to just pull one up as a tester.
 
If that test onion looks and tastes right, then all your other spring onions are ready to pick too.
 
Remember, they won’t all mature at exactly the same time, so you might find that a few stragglers need a week longer.
 

Best Time of Day to Harvest Spring Onions

The time of day matters more than you might think when you’re working out when spring onions are ready to pick.
 
The ideal time to harvest is in the morning, right after the dew has dried but before the afternoon sun hits its peak.
 
At that time, the plants are fully hydrated, which means crisp stems and juicy green tops.
 
If you wait until late afternoon or evening, spring onions can become a bit limp from the heat.
 
And while spring onions are ready to pick at any hour, an early harvest keeps them fresher and allows them to store better in the fridge.
 

What Happens if You Leave Spring Onions in the Ground Too Long?

You might be asking what happens if you miss that window and spring onions are no longer ready to pick as green onions.
 
Well, they simply keep growing and turn into bulbs.
 
The stems thicken, the mild flavor strengthens, and the green tops may start to flop over.
 
At that point, you haven’t ruined your harvest, you’ve just let them develop into scallions or small cooking onions instead.
 
Spring onions are ready to pick in that state too, but they won’t have that same raw salad crunch they would have earlier.
 
If you want to keep harvesting spring onions over a long season, plant new seeds every couple of weeks.
 
That way, you’ll always have a fresh batch that’s ready to pick at the perfect stage, no matter when you check the garden.
 

So, When Are Spring Onions Ready to Pick?

Spring onions are ready to pick when the stem is about pencil-thick, the green tops are tall and sturdy, and the base shows just a slight swell.
 
That combination of signs tells you spring onions are ready to pick for the ideal mild and sweet flavor that makes them so beloved in salads, stir-fries, and garnishes.
 
The best answer to when are spring onions ready to pick is usually 60 to 90 days after planting, but the visual cues will never steer you wrong.
 
Just harvest them in the morning, test one if you’re unsure, and don’t stress if a few stay in the ground a bit longer.
 
So next time you walk through your garden and wonder when are spring onions ready to pick, trust your eyes, feel the stem, and pull when it looks perfect.