How to Grow Bunching Onions


Bunching onions, also known as scallions, are really nothing more than young onions planted from seeds. Although there is a variety that is considered the true scallion, young, immature onions with a white base and green, straight tops may be sold as either bunching onions or scallions in supermarkets and produce stands. Growing bunching onions at home can be accomplished on a sunny windowsill, but they thrive when planted in the garden.

Things You'll Need

  • Garden tools Compost Onion seeds
  • Choose a sunny location that receives at least six hours of direct sunlight a day.

  • Prepare the soil by tilling to a depth of 8 inches. Remove any rocks or debris, and rake the soil until it's smooth. Finely worked soil produces the best onions.

  • Add plenty of compost or other organic matter. Onions like fertile soil and will benefit from organic materials.

  • Plant the onion seeds in early spring, as soon as the soil can be worked. Plant the seeds 4 inches apart in rows if you intend to let some mature into bulbs. Otherwise, broadcast the seeds over a wide row of 4 to 8 inches.

  • Cover the seeds lightly with soil, and firm down with your hands.

  • Spray water to dampen the soil and keep the soil evenly moist until seeds germinate in seven to 10 days, depending on the variety and the soil temperature.

  • Harvest when young onions are 8 to 10 inches high, usually within eight to 10 weeks.

Tips & Warnings

  • Start onions indoors six to eight weeks before the last frost for an earlier harvest.

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  • Photo Credit Andrea Kratzenberg/
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