American Flag Leek Seed


American Flag Leek seeds are easy to grow, and the microgreens have a flavor and scent similar to sweet onions.
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$2.09
Seed for 1010 Tray$3.59
By the Ounce$6.99
1/4-lb Bag$17.99

American Flag Leek Seed Highlights

  • Germination: 3 to 4 days.
  • Soak: No need.
  • Harvest: 12 to 15 days
  • Flavor: Mild onion flavor.
  • Nutrients: Vitamins B6, folate (B9) & C, and iron.

A relative of onion and garlic, American Flag Leeks taste like onions and will add color and flavor to any micro-salad or egg dish.

When chopped, leek microgreens smell like sweet onions, and their flavor is similar to mature leeks.

The finished microgreen is a long, slender green similar to miniature chives. Use leek microgreens as an onion substitute  — fantastic on hamburgers, soups, garnishes, and more.

A small amount of leek microgreens goes a long way, as the onion flavor can overpower a dish if used too heavily.

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

Leeks 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. So the seed pod isn’t much of an issue when cooking. If it bothers you, rinse them off with running water.

Leeks are ready to harvest between 12 and 15 days after sowing.

American Flag Leek Seed Package Sizes

  • The Home Microgreens tray seed packet weighs 3.0 grams and contains approximately 1,000 seeds.
  • The 1010-tray seed packet weighs 8.0 grams.

We also sell American Flag Leek seed in the following size packages.

  • by the ounce
  • 4-ounce packages

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 Leek 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 American Flag Leek Seed

By Weight

Home Microgreens Tray: 3.0 grams

1010 Tray: 8.0 grams

1020 Tray: 16 grams

By Measuring Spoon

Home Microgreens Tray: 1.1 teaspoons

1010 Tray:  3 teaspoons

1020 Tray: 5.9 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 Leek 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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