How To Regrow Green Onions In Water or Soil

Green onions, also known as scallions or spring onions, are a staple in many kitchens around the world. Their crisp texture and mild flavor make them a versatile ingredient in a variety of dishes. What’s even better is that green onions are incredibly easy to re-grow at home, making them a cost-effective and sustainable choice for your kitchen. Here’s a step-by-step guide on how to re-grow green onions from kitchen scraps.

Regrowing green onions can extend their life almost indefinately

Materials Needed:

  • A bunch of green onions
  • A glass or small jar
  • Water
  • Scissors or a knife
  • Potting soil (optional)
  • A small pot (optional)

Step-by-Step Guide:

  1. Prepare the Green Onions:
    • Start with a fresh bunch of green onions. Use the green tops in your cooking, but make sure to leave at least an inch of the white root ends intact.
    • Trim any slimy or damaged parts from the white bulbs.
  2. Place in Water:
    • Fill a glass or small jar with enough water to cover the roots but not the entire bulb. Typically, an inch of water is sufficient.
    • Place the green onion bulbs root-side down into the water.
  3. Find a Sunny Spot:
    • Place the glass in a sunny spot, such as a windowsill. Green onions thrive with plenty of light, so a south-facing window is ideal.
  4. Change the Water Regularly:
    • To prevent mold and bacteria growth, change the water every two to three days. Make sure the roots are always submerged in water.
  5. Watch Them Grow:
    • Within a few days, you’ll notice the green shoots beginning to grow. In just over 1 week, the green onions should be long enough to start using again.
    • Trim what you need, but always leave at least an inch of the white bulb to allow for continuous regrowth.
  6. Transplant to Soil (Optional):
    • If you prefer, you can transplant the growing onions into soil once they have a healthy amount of green growth.
    • Choose a small pot with good drainage and fill it with potting soil.
    • Make a small hole and gently plant the green onions, ensuring the roots are covered with soil and the green tops are above the surface.
    • Water the soil regularly to keep it moist but not waterlogged.
  7. Harvest and Repeat:
    • Continue to harvest the green tops as needed. With proper care, your green onions will continue to produce new shoots for several weeks or even months.
    • If the green onions stop producing or start to look weak, you can repeat the process with new green onions.

Troubleshooting Common Issues

  • Slimy Roots: If the roots become slimy or the water smells bad, change the water more frequently and rinse the roots.
  • Slow Growth: If the growth seems slow, try placing the glass in a brighter spot or using a diluted liquid fertilizer to give the plants a nutrient boost.
  • Wilting Shoots: Ensure the bulbs are not entirely submerged in water as this can cause the shoots to wilt.

Tips for Success:

  • Use Fresh Onions: For best results, start with the freshest green onions you can find.
  • Proper Lighting: Ensure your green onions get enough light. If natural light is insufficient, consider using a grow light.
  • Avoid Overcrowding: If planting in soil, give each onion enough space to grow without competing for resources.


Re-growing green onions is a simple and rewarding way to make your kitchen more sustainable. Not only does it save money, but it also ensures you always have fresh green onions on hand. With minimal effort and materials, you can enjoy a continuous supply of this versatile vegetable.

Re-growing green onions is a simple and rewarding process that can be done with minimal effort and materials. Not only does it provide a continuous supply of fresh greens, but it also reduces waste and is a fun project for both adults and kids alike. So next time you have green onion scraps, don’t throw them away—re-grow them and enjoy the endless cycle of fresh scallions!

Happy gardening!


Best Selling author of several no-dig gardening books, James has over 40 years of gardening knowledge and experience to share with like-minded gardening enthusiasts.

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