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How to Grow Green Onions Indefinitely

How to Grow Green Onions Indefinitely

Grow Green Onions Indefinitely
Grow Green Onions Indefinitely – Image from Pixabay

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Green onions, also known as scallions, are a versatile and easy-to-grow vegetable that can be regrown indefinitely with just a little water and sunlight. This makes them perfect for anyone looking to maintain a constant supply of fresh green onions without the need for soil or extensive gardening knowledge. Here’s a step-by-step guide on how to grow green onions in jars with just water.

Materials Needed:

  • Green onion stalks (with roots)
  • A jar or glass container
  • Water
  • A sunny windowsill

Step-by-Step Guide:

  1. Prepare the Green Onions:
    • Purchase a bunch of green onions from your local grocery store or use leftovers from a previous batch.
    • Cut the green tops off, leaving about 1-2 inches of the white base with the roots intact. This is the part you will regrow.
  2. Select a Container:
    • Choose a jar or glass container that is tall enough to support the green onion stalks without them tipping over. A mason jar, small glass, or even a recycled glass bottle works well.
    • Make sure the container is clean to prevent any bacterial growth.


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  3. Add Water:
    • Fill the jar with enough water to cover the roots but avoid submerging the entire stalk. Typically, 1-2 inches of water is sufficient.
    • Using tap water is fine, but letting it sit out for a few hours to allow chlorine to dissipate can be beneficial for the onions.
  4. Place the Green Onions in the Jar:
  5. Positioning:
    • Place the jar on a sunny windowsill where the green onions can receive plenty of natural light. Green onions thrive with at least 6-8 hours of sunlight daily.
    • Rotate the jar every few days to ensure even light exposure.
  6. Maintenance:
    • Change the Water Regularly: To prevent the water from becoming stagnant and promoting bacterial growth, change the water every 2-3 days. Rinse the roots gently to remove any debris.
    • Monitor Growth: Within a few days, you’ll notice new green shoots emerging from the tops. The onions will continue to grow taller over time.
  7. Harvesting:
    • Once the green tops have grown to a desirable length (typically 6-8 inches), you can start harvesting.
    • Use scissors to cut off the green tops, leaving about an inch above the white base. The green onions will continue to regrow after each cutting.


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  8. Repeat:
    • Continue the cycle of changing the water, ensuring adequate sunlight, and harvesting as needed. With proper care, your green onions can regrow indefinitely.

Tips for Success:

  • Keep the Water Clean: Regularly changing the water is crucial to avoid bacterial buildup and to keep the roots healthy.
  • Avoid Overcrowding: If you’re regrowing multiple green onions, make sure they have enough space in the jar to avoid overcrowding, which can hinder growth.
  • Monitor for Pests: Occasionally check the roots and water for any signs of pests or mold. If you notice any issues, rinse the roots thoroughly and replace the water more frequently.

Growing green onions in jars with just water is not only a fun and educational project but also a sustainable way to ensure a constant supply of fresh herbs in your kitchen. This simple method requires minimal effort and resources, making it an ideal gardening activity for both beginners and experienced gardeners. Enjoy your endless supply of green onions!

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