Q&A for How to Grow Spring Onions

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How do I regrow spring onions from cuttings?

Steve Masley
Home & Garden Specialist
Steve Masley has been designing and maintaining organic vegetable gardens in the San Francisco Bay Area for over 30 years. He is an Organic Gardening Consultant and Founder of Grow-It-Organically, a website that teaches clients and students the ins and outs of organic vegetable gardening. In 2007 and 2008, Steve taught the Local Sustainable Agriculture Field Practicum at Stanford University.

Steve Masley

Home & Garden Specialist

Expert Answer

Place the roots in water and wait until they start to develop new white root growth. Then, you can transfer them directly into soil.

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Do spring onions regrow?

Maggie Moran
Home & Garden Specialist
Maggie Moran is a Professional Gardener in Pennsylvania.

Maggie Moran

Home & Garden Specialist

Expert Answer

Yes, they are easy to regrow. Simply take the bulbs with the roots attached and place them, roots down, into a small jar or cup. Place the cup in a sunny area and submerge the roots for about a week. At this point, you should start seeing regrowth.

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How long do spring onions take to grow?

Maggie Moran
Home & Garden Specialist
Maggie Moran is a Professional Gardener in Pennsylvania.

Maggie Moran

Home & Garden Specialist

Expert Answer

Shoots appear within days and take, at most, two weeks to grow a shoot that can be harvested.

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How do you propagate green onions?

Maggie Moran
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Maggie Moran is a Professional Gardener in Pennsylvania.

Maggie Moran

Home & Garden Specialist

Expert Answer

You take the green onion roots and put them in a glass of water that just covers the roots. Be sure to change the water every few days.

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I let my spring onion go to seed and have noticed about 5 30-mm bulbs around each stalk -- are these edible?

Maggie Moran
Home & Garden Specialist
Maggie Moran is a Professional Gardener in Pennsylvania.

Maggie Moran

Home & Garden Specialist

Expert Answer

Yes, spring onions are edible. Though you let these seed themselves and grow bulbs, they are just as good as ones you intended to grow.

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Can spring onions be grown from over and over?

wikiHow Staff Editor
Staff Answer
This answer was written by one of our trained team of researchers who validated it for accuracy and comprehensiveness.

wikiHow Staff Editor

Staff Answer

Spring onions will produce edible stems about 4 or 5 times after you snip them off the first time. Onions are perennial, so they will regrow each year as long as they're healthy.

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Do onions grow back every year or do you have to replant them every spring?

wikiHow Staff Editor
Staff Answer
This answer was written by one of our trained team of researchers who validated it for accuracy and comprehensiveness.

wikiHow Staff Editor

Staff Answer

Spring onions are perennial and will produce edible stems every year as long as they're healthy. They will reproduce stems after cutting about 4 or 5 times per season.

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How much phosphate does spring onion need?

Community Answer

Be very careful using phosphate or nitrogen. You could end up with all green and no onion bulb or sending them to seed way too early. If you do use it, apply only a very small amount.

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How long do spring onions take to germinate?

Community Answer

All types of onion seeds can take up to 10 days. Some varieties, a bit longer. Don't try to hurry them up by applying warmth, as in a heated germinator. Cool germination is much better.

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Can spring onions be planted in water on top of pebbles in a glass jar in the windowsill?

Community Answer

Spring onions should be planted in dirt. Your method includes too much water.

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I planted onion sets last autumn and this spring they looked like smaller 'spring onions', is that what 'spring onions 'are? Or are they a particular variety and should I eat mine or not?

Community Answer

They should look like small green stalks, similar to a green onion or scallion.

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Question

What is the harvesting period after sowing?

Community Answer

The old wives tale is plant on the coldest day of the year and harvest before the hottest day of the year. In other words, plant your onions soon as the climate/soil is cool enough and harvest before the heat of summer.

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Question

What do I need to plant a spring onion?

Community Answer

Either start them off from seeds or buy seedlings/sets. Then plant them out when they are large enough into unfertilised soil.

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Should I wait until after the spring onions flower to cut the tops?

Community Answer

No, if you leave it to flower, then the flavor and the nutritional value of the spring onions will decrease.

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Question

Can I grow spring onions from onion seeds? If so, will I need a large amount of room? I live in an apartment.

Anton Skipworth

Community Answer

You can, and the amount of room needed depends entirely on how many plants you're planning to grow. One spring onion plant will grow to maturity quite happily in a 2-liter plant pot.

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Would organic fertilizer be good for spring onions?

Anton Skipworth

Community Answer

Spring onions generally tend not to require much in the way of fertilization. With that said, organic fertilizers are recommended if you are going to fertilize. If you're worried about nutrient intake because of dry soil, you may want to try a mulch before you apply fertilizers, as mulches are good at retaining moisture.

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Do I need to dry spring onions before planting them?

Community Answer

No. You don't need to dry the bulb before you re-plant, it can be planted as it is.

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