Spring Onions

When To Harvest Spring Onions: A Comprehensive Guide

Discover the perfect timing for harvesting spring onions. Learn expert tips and techniques for picking these delicious, versatile veggies at their peak freshness.


Spring onions, with their mild and crisp texture, can add a delightful flavor to various dishes. Whether you’re a seasoned gardener or a novice, knowing when to harvest spring onions is crucial to enjoy their peak flavor and freshness. In this comprehensive guide, we’ll walk you through everything you need to know about picking these versatile vegetables at just the right time.

When To Harvest Spring Onions

When To Harvest Spring Onions

Spring onions are a versatile addition to your garden, and getting the timing right for their harvest is key to savoring their exceptional taste. Here’s a step-by-step guide to help you determine when your spring onions are ready for the picking:

When To Harvest Spring Onions

1. Observe Leaf Growth

Understanding when to harvest spring onions involves keen observation of the leaf growth. This essential step in your gardening journey ensures that you pick these flavorful vegetables at their peak. Let’s delve deeper into the process:

Spring onions, with their slender green shoots and small white bulbs, have a unique growth pattern. Observing the growth of their leaves is a reliable indicator of their readiness for harvest.

Start by regularly inspecting your spring onion plants as they mature. As the weeks pass, you’ll notice the onion leaves gradually extending upwards. When these leaves reach a height of about 8 to 10 inches, it’s a clear sign that your spring onions are on the path to maturity.

This particular height range is crucial because it signifies that the onions have developed sufficiently to provide a satisfying yield. It’s during this growth stage that the bulbs beneath the soil have expanded to a desirable size, making them perfect for culinary use.

The act of observing leaf growth not only aids in determining the right time for harvesting but also connects you more intimately with your garden. It allows you to witness the natural progression of your plants and become attuned to their needs.

Moreover, this close monitoring of leaf growth aligns with the principle of harvesting at the peak of freshness. Spring onions, like many vegetables, are at their most flavorful when picked at just the right moment. Harvesting too early may result in underdeveloped bulbs, while waiting too long can lead to toughness and reduced flavor.

2. Check Bulb Size

When determining the optimal time for harvesting your spring onions, assessing the size of the bulb plays a pivotal role. This step is vital in ensuring that you pick these delectable vegetables when they are at their peak. Let’s explore the significance of checking the bulb size:

Spring onions, with their slender green shoots and crisp white bulbs, undergo a remarkable transformation as they grow. Understanding the ideal size of the bulb is key to reaping the full rewards of your gardening efforts.

As your spring onion plants mature, you’ll notice the bulbs beneath the soil expanding. The size of these bulbs is a direct reflection of their readiness for harvest. Mature spring onions typically boast bulbs that are approximately the size of a large marble or a small golf ball.

This specific size range is crucial because it signifies that the onions have achieved their full potential in terms of flavor and texture. Bulbs of this size are known for their optimal taste, making them a prized addition to various culinary dishes. Their size also ensures a satisfying yield from your gardening endeavors.

When you encounter spring onions with bulbs in this size range, it’s a clear signal that they are ready to be harvested. However, it’s essential to exercise care during this process to avoid damaging the bulbs or the surrounding plants. Gently loosen the soil around the base of the spring onion, taking care not to disturb neighboring plants, and carefully lift the onion from the ground.

Harvesting at the right bulb size is a practice that guarantees the best culinary experience. Bulbs that are too small may lack the desired flavor, while overgrown bulbs can be tough and less appealing.

3. Gently Squeeze the Bulbs

Spring onions, with their delicate green shoots and crisp white bulbs, are a delight to cultivate in your garden. However, the challenge lies in knowing precisely when they are at their peak, bursting with flavor and ready to grace your dishes.

The “squeeze test” is a simple yet effective way to gauge the maturity of your spring onions. Here’s how it works:

  • Gently Squeeze the Bulbs: Reach down to the base of your spring onion plant and carefully apply gentle pressure to the bulb. It should feel firm and plump to the touch. This firmness indicates that the onion has reached maturity and is ready for harvesting.
  • Check for Softness: If, during your gentle squeeze, you notice that the bulb feels soft or squishy, it’s a clear sign that the onion is not yet fully mature. In this case, it’s best to leave it in the ground for a little longer to allow it to develop further.
  • Assess for Yield: Additionally, pay attention to whether the bulb yields to your touch. If you feel a noticeable “give” when squeezing the bulb, it’s an indicator that it might not be mature enough for harvest. Mature spring onions should offer resistance when gently squeezed.

By performing this simple yet informative test, you can confirm the readiness of your spring onions for harvest without the need for specialized tools or complicated procedures. It’s a tactile method that connects you directly with your garden and allows you to make an informed decision about when to pick these flavorful vegetables.

The “squeeze test” aligns with the principle of harvesting at the peak of freshness, ensuring that you enjoy the best flavor and texture from your spring onions. It also prevents premature harvesting, which can result in bulbs that are underdeveloped and less flavorful.

4. Inspect the Foliage

When the time comes to harvest your spring onions, a crucial aspect to consider is the condition of the foliage. By closely examining the leaves of your spring onion plants, you can gain valuable insights into their readiness for picking. Let’s explore the significance of inspecting the foliage:

Spring onions are known for their distinctive green tops and crisp white bulbs. To ensure that you pick them at the perfect moment, take a moment to observe the foliage of your plants.

Here’s how you can conduct a visual inspection:

  • Vibrant and Upright: Healthy spring onion tops are characterized by their vibrant green color and upright posture. When the leaves are vividly green and stand tall, it’s a positive indicator that your spring onions are ready for harvesting. This vibrant appearance signifies that the plant is in its prime condition, and the bulbs beneath the soil have likely reached an ideal size.
  • Wilted or Yellowing Tops: On the other hand, if you notice that the green tops of your spring onions appear wilted or yellowing, it may be an indication that you’ve waited too long to harvest. Wilted foliage suggests that the plant has begun diverting energy away from the leaves and towards seed production, which can negatively impact the flavor and quality of the bulbs.

Inspecting the foliage serves as a visual confirmation of the overall health and vitality of your spring onion plants. Healthy leaves are a sign that the plant is actively photosynthesizing, producing energy, and channeling it into the development of flavorful bulbs.

Harvesting at the right time, as indicated by vibrant and upright foliage, ensures that you enjoy the best possible taste and texture from your spring onions. It also aligns with the principle of harvesting before the plant shifts its focus to seed production.

5. Consider the Weather

When determining the ideal time for harvesting your spring onions, it’s essential to factor in the prevailing weather conditions in your area. Spring onions thrive in specific temperature ranges, and understanding their preferences can significantly impact the quality of your harvest. Let’s delve into why you should consider the weather:

Spring onions are a cool-season crop, and they tend to thrive in mild and cool weather conditions. To ensure a bountiful and flavorful harvest, here’s why you should take the weather into account:

  • Optimal Temperature Range: Spring onions are at their best when grown and harvested in temperatures ranging from 50 to 75 degrees Fahrenheit (10 to 24 degrees Celsius). This moderate climate provides the ideal conditions for them to develop the crisp texture and mild flavor that they are known for.
  • The Impact of Extreme Heat: On the contrary, when exposed to prolonged periods of extreme heat, spring onions may bolt. Bolting refers to the process where the plant prematurely sends up a flower stalk and diverts its energy away from bulb development. When this happens, the bulbs can become smaller and less flavorful.
  • Mild and Cool Weather Benefits: Harvesting your spring onions during mild and cool weather ensures that the bulbs have had ample time to develop without the stress of extreme temperatures. The result is spring onions that are not only flavorful but also boast a pleasing texture, making them a delightful addition to your culinary creations.
  • Seasonal Considerations: Depending on your geographical location, it’s essential to align your planting and harvesting times with the seasons. In many regions, spring and early fall are prime seasons for planting and harvesting spring onions, as these times offer the moderate temperatures that these vegetables favor.

By paying attention to the weather conditions in your area and planting accordingly, you can optimize the flavor and quality of your spring onion harvest. It’s all about creating the ideal environment for these vegetables to thrive and develop to their full potential.

6. Time of Day

Early morning or late afternoon is the best time to harvest spring onions. During these cooler parts of the day, the onions are less stressed and hold onto moisture better, ensuring a crisp and fresh taste.

FAQs About Harvesting Spring Onions

When To Harvest Spring Onions

How do I know when my spring onions are ready to be harvested?

The readiness of spring onions for harvest depends on several factors, including the type of spring onion, growing conditions, and your personal preferences. Here are some indicators to help you determine when to harvest:

  • Size: Spring onions are typically ready for harvest when they reach a desirable size. For common green onions, this is usually when they are about 6-8 inches tall and have a pencil-thin diameter.
  • Leaf Growth: Observe the foliage. When the leaves are vibrant green and healthy, it’s a good sign that the spring onions are ready for harvest.
  • Bulb Formation: If you’re growing bulb-forming spring onions, check for the formation of a rounded bulb at the base of the plant. Once the bulb reaches an appropriate size, it’s time to harvest.
  • Taste Test: The best way to determine readiness is by tasting the spring onions. Sample a leaf or two to assess their flavor. Harvest when they have a mild, onion-like taste that suits your preference.
  • Days to Maturity: Refer to the seed packet or plant label for the estimated days to maturity. This can give you a rough idea of when to start checking for readiness.

Can I harvest spring onions at any time?

While you can technically harvest spring onions at any time during their growth, doing so at the right stage ensures the best flavor and texture. Harvesting too early may result in underdeveloped bulbs and less flavorful leaves.

What is the best time of day to harvest spring onions?

The best time to harvest spring onions is in the morning when the plants are well-hydrated from the overnight dew. This helps maintain the crispness of the leaves and the overall quality of the crop. Avoid harvesting during the heat of the day, as the onions may wilt quickly.

What tools do I need for harvesting spring onions?

Harvesting spring onions is a straightforward process, and you won’t need many tools. Here are the essentials:

  • Garden Shears or Scissors: These are ideal for cleanly cutting the leaves and stems without damaging the plant.
  • Gloves: Optional but recommended, especially if you have sensitive skin or are handling a large quantity of onions.
  • Container or Basket: Use this to collect the harvested spring onions as you work your way through the garden.

Should I harvest the entire plant or just the leaves?

The decision to harvest the entire plant or just the leaves depends on your culinary needs and preferences:

  • Harvesting Leaves Only: If you prefer a continuous harvest of fresh green leaves for salads, garnishes, or cooking, you can snip the outer leaves and leave the central stem to continue growing. This method allows the plant to produce more leaves over time.
  • Harvesting the Entire Plant: If you want mature bulbs for recipes or to store, wait until the spring onions have fully developed bulbs and then harvest the entire plant, including the leaves and bulbs.

Can I harvest spring onion bulbs and still have the plant regrow?

In most cases, spring onions are grown as annuals, meaning they complete their life cycle in one season and do not regrow after harvesting the bulbs. However, some varieties may exhibit limited regrowth if the bulbs are not fully mature when harvested. To encourage regrowth, leave a portion of the bulb and roots in the soil, and it may produce new leaves, albeit with a milder flavor.

How do I harvest spring onions with bulbs?

Harvesting spring onions with bulbs requires a slightly different approach:

  • Loosen the Soil: Gently loosen the soil around the base of the spring onion to make bulb removal easier.
  • Grasp the Plant: Firmly grip the base of the plant, just above the bulb, and carefully pull it out of the ground.
  • Trim the Roots: Trim the roots to about 1/4 inch (0.6 cm) from the bulb.
  • Clean and Store: Remove any loose soil from the bulb and roots, and store them in a cool, dry place. You can store bulb onions for several weeks.

How do I store harvested spring onions?

Proper storage ensures that your harvested spring onions stay fresh for an extended period:

  • With Bulbs: If you’ve harvested spring onions with bulbs, store them in a cool, dry place. You can place them in a breathable bag or wrap them in paper towels and then store them in the crisper drawer of your refrigerator. They should last for a few weeks.
  • Without Bulbs (Leaves Only): For leaves-only harvests, store them in a plastic bag with a paper towel to absorb excess moisture. Seal the bag and refrigerate; they should stay fresh for about a week.

Can I leave spring onions in the ground for an extended period?

Yes, you can leave spring onions in the ground for an extended period after they are mature. However, this should be done with some considerations:

  • Mulching: Applying a layer of mulch around the plants can help regulate soil temperature and moisture levels, extending the harvest window.
  • Monitor Bolting: Be vigilant for signs of bolting (flowering). Once spring onions bolt, the quality of the bulbs and leaves declines rapidly. Harvest promptly if you notice flowering stalks.
  • Harvest as Needed: If you prefer fresh spring onions, you can leave them in the ground and harvest as needed. Regular harvesting also encourages new leaf growth.

What happens if I leave spring onions in the ground too long?

If spring onions are left in the ground for too long, they may become overmature and develop a tougher texture and a stronger, more pungent flavor. Additionally, they might bolt and produce flowers, diverting energy away from bulb development. It’s best to harvest them when they reach their prime stage to enjoy the best taste and texture.

Can I harvest and store spring onion seeds?

Yes, you can harvest and store spring onion seeds if you want to replant them in the future. Here’s how:

  • Allow Bolting: Let some of your spring onions bolt and produce flowers. These flowers will eventually turn into seed pods.
  • Harvest Seed Pods: Once the seed pods are dry and brown, carefully cut them from the plant and collect the seeds.
  • Dry and Store: Place the collected seeds in a dry, well-ventilated area for a few days to ensure they are completely dry. Then store them in a cool, dark place in a sealed container or envelope.

What are the signs of overripe or spoiled spring onions?

Spring onions that are overripe or spoiled will exhibit several signs:

  • Tough Texture: Overripe spring onions tend to become tougher, especially the leaves.
  • Yellowing or Browning: The leaves and stems may start to turn yellow or brown, indicating that they are past their prime.
  • Sliminess or Mold: If you notice sliminess or mold on the spring onions, they are no longer safe to consume and should be discarded.
  • Strong Odor: Overripe spring onions can develop a strong and unpleasant odor.

Can I harvest and eat the flowers of spring onions?

Yes, you can harvest and eat the flowers of spring onions. The flowers have a mild onion flavor and can be used as an edible garnish in salads or as a decorative element in various dishes. However, be mindful not to let too many spring onions bolt, as this can reduce the quality of the bulbs and leaves.

Are there any differences in harvesting green onions and scallions?

In culinary terms, “green onions” and “scallions” are often used interchangeably to refer to the same plant. However, there can be regional and cultural variations in their naming. Whether you call them green onions or scallions, the harvesting process remains the same, focusing on the size, leaf condition, and bulb development.

Can I continue to harvest spring onions in the fall and winter?

Spring onions are typically grown in the spring and summer months. However, in mild climates, you can extend the growing season and continue to harvest them into the fall and winter. To do this:

  • Protect from Frost: Use row covers or cloches to protect the plants from frost during colder months.
  • Mulch: Apply a layer of mulch around the plants to regulate soil temperature and moisture.
  • Monitor Growth: Keep an eye on the growth of the plants, and harvest as needed. The growth rate may slow down during the colder seasons.

Can I harvest spring onions in pots or containers?

Yes, you can successfully grow and harvest spring onions in pots or containers. Use well-draining soil and ensure that the container has adequate drainage holes. Follow the same harvesting guidelines as for in-ground spring onions, paying attention to size, leaf quality, and bulb development. Container-grown spring onions can be harvested as needed, just like those in the garden.

What should I do with harvested spring onions?

Harvested spring onions can be used in a wide range of culinary dishes. Here are some ideas:

  • Salads: Add chopped spring onions to salads for a mild onion flavor and a pop of color.
  • Sautéed or Stir-Fried: Use sliced spring onions in stir-fries and sautéed dishes for a subtle onion flavor.
  • Garnish: Sprinkle chopped spring onions on top of soups, omelets, or grilled meats for added freshness and flavor.
  • Pickling: Preserve spring onions by pickling them with vinegar, sugar, and spices for a tangy condiment.
  • Dips and Salsas: Incorporate chopped spring onions into homemade dips and salsas for an extra layer of flavor.
  • Grilled: Grill whole spring onions with a drizzle of olive oil and seasonings for a delicious side dish.
  • Fried: Tempura-fry spring onion stalks for a crispy appetizer or snack.
  • Freezing: You can also freeze chopped spring onions for later use in cooked dishes, though the texture may change.

Remember to wash and trim your spring onions before using them in your recipes.

Can I sell my harvested spring onions?

If you have a surplus of harvested spring onions and want to sell them, you can explore local farmers’ markets, community-supported agriculture (CSA) programs, or online marketplaces. However, be sure to adhere to any local regulations and licensing requirements for selling fresh produce.

In summary, when is the best time to harvest spring onions?

The best time to harvest spring onions depends on your specific goals and preferences:

  • For fresh, mild leaves, harvest when they are about 6-8 inches tall.
  • To obtain mature bulbs, wait until the bulbs have fully formed.
  • Harvest in the morning for optimal freshness.
  • Use gardening shears or scissors to avoid damaging the plant.
  • Store spring onions with bulbs in a cool, dry place, and leaves-only harvests in the refrigerator.
  • Be mindful of overripeness, bolting, and spoilage.


Harvesting spring onions at the right time ensures that you enjoy the best flavor and quality from your garden. By following the guidelines outlined in this comprehensive guide, you’ll be able to pick these versatile vegetables at their peak freshness. So, get ready to elevate your culinary creations with the delightful taste of freshly harvested spring onions!