Spring onions are one of my favorite crops to grow. They’re easy to manage, versatile in the kitchen, and grow relatively quickly.
But one of the trickiest parts of growing them—especially when you’re starting out—is knowing exactly when they’re ready to harvest.
If you’re wondering how to time your harvest just right, let me share what I’ve learned through my own gardening adventures.
How Long Do Spring Onions Take to Grow?
Spring onions, also known as scallions or green onions, are quite speedy growers. Most varieties are ready to harvest in about 8–12 weeks after sowing, though this can vary depending on the type you’re growing and the weather conditions.
If you’re in a rush, they can be pulled even earlier when they’re smaller and more tender.
Signs Your Spring Onions Are Ready
Here’s how to tell if your spring onions are at their peak:
- Size of the Stems
The stems should be around 1–2 cm in diameter. Smaller stems are perfectly edible and often sweeter, but if they’re much thinner, they may not have fully developed yet. - Height of the Leaves
Look for green leaves that are around 30 cm (12 inches) tall. If they’ve grown much taller than this, they might start to lose their delicate flavor and become tougher. - Color of the Leaves
Healthy spring onions will have vibrant green leaves. If the tips are yellowing or browning, it could be a sign they’ve been in the ground a bit too long or are struggling with pests or diseases. - Bulb Development
If you’re growing a variety of spring onion that develops small bulbs, you’ll notice the base of the plant starting to swell slightly. However, many types remain slender, so don’t wait for a bulb to appear if it’s not typical for your variety.
Harvesting Spring Onions
Harvesting spring onions is as simple as pulling them up by the base. If the soil is compact or the plants are stubborn, use a trowel or fork to loosen the ground first.
Be gentle to avoid damaging the stems.
If you want to extend your harvest, try pulling every other spring onion and leaving the rest to grow a bit longer.
This thinning method ensures a continuous supply without sacrificing flavor or quality.
Can You Harvest Spring Onions Early?
Absolutely! One of the best things about spring onions is their versatility at different growth stages.
If you’re after tender, mild-flavored onions, you can pull them when they’re just a few weeks old and pencil-thin.
These are perfect for salads or garnishes.
Storing Your Spring Onions
Once harvested, spring onions don’t last forever, but you can keep them fresh for a few days if you store them properly:
- In the Fridge: Wrap the roots in damp paper towels and place them in a plastic bag or container. This will keep them crisp for up to a week.
- In Water: You can also place them upright in a glass of water, covering the roots. This works well if you’re planning to use them within a few days.
Final Thoughts
There’s something so satisfying about pulling your first batch of spring onions from the garden. Whether you’re using them in a stir-fry, adding a fresh crunch to salads, or sprinkling them over a baked potato, homegrown spring onions just taste better.
If you’re new to growing them, don’t stress too much about getting the timing perfect. They’re a forgiving crop, and even if you harvest them a little early or late, they’ll still add a delicious touch to your meals. Happy gardening!
