How to Grow Green Onions – A Beginner’s Guide

rows of green onions being grown

Green onions, which are known botanically as Allium Fistulosum, are a type of vegetable that can easily be grown at home. Continue reading to learn the basics of growing green onions as well as common mistakes to avoid along the way.

Best Time to Plant Green Onions

This will depend largely on your local climate, but as a rule of thumb, begin to plant the green onion seeds after the last danger of frost in spring. This is the best time to ensure that the seedlings survive the weather.

To check when green onions are most likely to thrive in your area, see the USDA Plant Hardiness Zone Map. If you live outside the US, do a quick search for ‘plant hardiness zone + [city]’.

How to Plant Green Onions the Right Way

There are a number of things to consider that will help you avoid some of the common mistakes of growing green onions in your home garden.

Often overlooked, your soil can have a huge impact on how well your green onions grow. Generally, your soil should be average. Soil PH levels should be around 6.0 to 7.0.

For best results, space the seeds 2″ apart in rows 12″ apart. The seeds should be sowed at a depth of about 0.25-0.5″. For each plant, be sure to sow at least a few seeds to ensure that at least one of them will germinate.

Begin thinning your green onion seedlings 3″ apart when seedlings are 1-2″ tall.

How Much Sunlight is Needed to Grow Green Onions

The amount of sunlight is another key to a successful harvest. Too much sunlight will dry out your green onions. Not enough sunlight will stunt your its growth or even kill it.

Ideally, your green onions should be getting full sun, which means as much sunlight as you can possibly give it, or at least 6 hours or more.

How Much to Water Green Onions

As you’ve figured by now, a lot can have an impact on how well your green onions do, and the amount of water is no different.

Ideally, the soil should be damp to touch; not soggy or bone dry. If the leaves on your green onions begin to change colors or start to look droopy, you need to adjust how much water you’re giving it.

Unfortunately, if you give it too much or too little water, you can kill it, so it’s best to just keep an eye on it and water as needed.

How Long Does it Take Green Onions to Germinate and Grow?

Now the fun part begins and you get to watch your green onions grow.

It takes approximately 10-12 days to germinate, and a total of 60 days from seed to harvest.

When to Harvest Green Onions

The best time to harvest your green onions is when scallions are pencil thick.

Green onions can grow up to about 12-14″ stalks.

What Can Green Onions Be Used For?

Food Use: This variety is a great choice for use in salads and sandwiches.

Flavor Profile: Zesty and mild.

Can Green Onions Grow in Pots and Containers?

Yes, you can plant up to 10 plants per 12″ container. This can help control weeds and keep your plant from growing out of control.

It also gives you the flexibility to move your green onions around if you need to adjust sunlight or bring it indoors to avoid harsh weather conditions.

Are Green Onions Safe for Bees?

Yes, green onions are safe for bees.

According to, bees pollinate human food crops that make up about 90% of the world’s nutrition.

Given their importance in our ecosystem and food supply, I feel it is important to note that growing green onions is bee-friendly.

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