How to Grow Corn Microgreens

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Corn microgreen shoots - yellow and green



Yes, 12 hours


1-2 days

Harvest Day:

Day 20

Total Blackout Days:

7 Days

Weighted Blackout:

First 3 Days

Blackout Dome:

Next 4 Days

Top watering:

Very light misting on Day 1 to Day 3.

Bottom watering:

Day 4 to Day 7.

Antifungal application:

First 3 days

Expected Harvest weight:

7x times the weight of seed


Sweet (without light) or Bitter (with light)

Shelf Life:

10 days

Things you need to grow Corn Microgreens

  1. 300g Corn seeds
  2. 10 x 20 Microgreens tray x 2 - without holes
  3. 10 x 20 Microgreens tray x 1 - with holes
  4. 6 cups of coco coir
  5. Grow lights (or sunlight)

Steps to grow Corn Microgreens

  1. Pre-soak the corn seeds in a pH balanced water (6.0 to 6.5) for about 12 hours.
  2. Stack a 10x20 tray with holes on top of the 10x20 tray that does not have holes.
  3. Fill the tray (with holes) to the top with coco coir.
  4. Spread the Corn seeds as evenly as possible.
  5. Mist antifungal spray water (2tbsp hydrogen peroxide in 1 liter of water) to avoid any mold or fungus.
  6. Stack another 10x20 tray on top for the first 3 Days for a Weighted Blackout. Add a 5 pound weight on top of the tray until 3 days.
  7. On Day 3, seeds will be germinated. Keep the 10x20 tray flipped on top until harvest day (next 3 Days) like a Blackout Dome so it can stretch for light a little bit more.
  8. From Day 4, start bottom watering as required.
  9. Harvest on day 7, when seedlings reach 3-4 inches.



What to expect

Do This

Day 3

Most seeds germinated

  • Mist with hydrogen peroxide spray until day 3
  • Blackout dome

Day 5

Tall yellow germinated seeds with white roots underneath

  • Bottom water if required

Day 6

Corn gets more taller

  • Bottom water if required

Day 7

Reached terminal height

  • Harvest day.

Alternate methods to grow Corn Microgreens

  1. If you don’t have a 10x20 seed tray, you could use any container you like.
  2. If you are planning on using soil as the growth medium and it has sticks or clumps, make sure to get rid of the big ones.
  3. If you do not have grow lights, you can use the natural sunlight to grow your Corn microgreens. Just make sure they get enough light by placing them in a sunny windowsill or a south facing window.

Tips on growing Corn microgreens

  • You could keep the corn microgreens under light but the flavor will be less sweet.
  • You could add a scoop of some fertilizer with coco coir to give the seedlings a boost, but it is not required.
  • You can expect a harvest of about 150g of Corn microgreens from 300 gms of Corn seeds.

Corn Harvest

Corn microgreens start germinating from the first day itself, and are ready for harvest by day 7.


A typical Corn harvest is expected to be 1g for every 2g of corn seeds. For example, if you use 300g of Corn seeds, you can expect a harvest of about 150g.


Business Tips for Selling Corn Microgreens

The best thing about corn microgreens is that the seeds are cheap, and it does not require any light at all to grow. Selling corn microgreens gives great ROI.


Also check out how to grow corn plant in a container.

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