White Onion Microgreen Seeds


Onion microgreens are easy to grow and very rich in flavor and nutrients.
HM Tray seed packet weighs 3.0 grams.
The 1010-tray seed packet weighs 8.0 grams.



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Available Options

Seed for HM Tray$2.69
Seed for 1010 Tray$4.99
By the Ounce$9.79
1/4-lb Bag$28.99

White Onion Microgreen Seed Highlights

  • Germination: 3 to 4 days.
  • Soak: No need.
  • Harvest: 11 to 15 days
  • Flavor: Strong onion flavor with no tears!
  • Nutrients: Vitamins A, B, C, and E, calcium, iron, magnesium, phosphorus, potassium, zinc, many trace elements, and amino acids.

Onion Microgreens are easy to grow and very rich in flavor and nutrients.

It takes a few greens on a sandwich or salad to taste the flavor! So, it’s best to start tasting small amounts to gauge their strength!

Onion microgreens smell strongly of onions but never make your eyes water or taste buds burn, even when chopped! Instead, chopping them up creates a beautiful aroma when added to a salad, burger, or steak.

The finished microgreen is a long, slender green similar to miniature chives. You can use micro-onions as an onion bulb substitute for many dishes — fantastic on hamburgers, salads, soups, garnishes, and more.

A small amount of onion microgreens goes a long way, so don’t use them too heavily initially.

White onion microgreen seed may produce more than one onion.

Harvest onion microgreens when they reach a height of 2 1/2- to 4 inches.

Onion microgreens will re-grow after harvest! You can get at least two or three cuttings.

The thin green stem will more than not have the remains of the black seed resting at the tip. The seed pod isn’t much of an issue when cooking. If it bothers you, rinse them off with running water.

Onions microgreens are ready to harvest between 11 and 15 days after sowing the seeds.

White Onion Microgreen Seed Package Sizes

  • The Home Microgreens tray seed packet weighs 3.0 grams and contains approximately 825 seeds.
  • The 1010-tray seed packet weighs 8.0 grams.

We also sell Onion microgreen seed in the following size packages.

  • By the ounce, and
  • 4-ounce bags.

How Much Seed Do You Need For Your Tray?

You don’t need to worry about how much seed you need if you use Home Microgreen planting trays or 1010 trays. Each seed packet has the correct number of seeds for a perfect tray of flavorful onion microgreens.

The seeding area of a Home Microgreen Tray is 37.5 square inches.

However, if you’re using a different planting tray, use the calculator in the article below to figure out how much seed you need.

Click this link to use the calculator: Home Microgreens Seed Density Calculator.

Seeding Density

Seeding Density for Onion Microgreen Seed

By Weight

Home Microgreens Tray: 3.0 grams

1010 Tray: 8.0 grams

1020 Tray: 16 grams

By Measuring Spoon

Home Microgreens Tray: 1.2 teaspoons

1010 Tray: 3.2 teaspoons

1020 Tray: 6.3 teaspoons

All volumetric measurements are level, not heaping spoons.

I use these vertical-sided measuring spoons because the seeds are easier to level with the straight sides.

These are my recommended seeding densities to produce a great-looking tray of Onion microgreens.

I like to allow microgreen leaves to develop to a larger size as they provide more nutrition & flavor than producing smaller leaves and stems.

Microgreen density depends on many environmental factors and seed germination percentages.

You may prefer to modify the seeding density, but my seeding densities are a great starting point if nothing else.

Check out the Home Microgreens Seed Density Course if you have a different size tray.


28.35 grams equals 1 ounce.

Three teaspoons equal 1 Tablespoon

Four Tablespoons equal 1/4 cup

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