Green onions can be grown from seed or as sets. Green onions are also referred to as bunching onions, and have a milder onion taste than storage onions.
They are actually immature onions that are harvested before the bulb matures. The green onion features a dark green stem (also called scallions) and a white bulb with roots. Both parts of the onion are edible.
Planting green onions
Plant onion seed as soon as the soil can be worked in the spring. Onion seeds germinate in a wide range of soil temperature, between 65° F and 86° F.
Sow and cover seed with ½” of soil and keep moist. Seeds can be started indoors 6-8 weeks prior to planting. They can be set in the garden about 1-1½” apart. To plant onions sets, simply press sets into the soil about 2″ apart.
Onions benefit from full sun, a soil pH of 6.0-7.5 and a well drained soil with plenty of premium compost or well rotted manure added. Feed with a complete balanced fertilizer during the growing season.
Maintaining green onions
Once your green onions have sprouted become well established, they are pretty easy to maintain.
Green onions generally need about one inch of water per week. If green onions are grown in rows, or raised beds, soaker hoses can be used for irrigation. It’s also a good idea to mulch around the plants to conserve soil moisture and suppress weeds.
Harvesting green onions
Dig or pull them when the tops reach between 6-8″ tall and the bulb have begun to swell.
To use as dried bulbs, wait until the green tops have withered and browned, then stop watering. Most green onions are ready to harvest between 70-90 days.
Pests & diseases of green onions
Pests and diseases are rare for the home grown green onion, but they can become susceptible to maggots, thrips, and soilborne diseases. Use crop rotation to avoid these issues.
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