top of page

Common Microgreen Growing Problems and How to Fix Them

Growing microgreens is simple, but sometimes things don’t go as planned. Problems like slow germination, yellow leaves, wilting, or bad smells can affect your crop.

The key is simple:
Find the cause → fix it → prevent it next time

Below are the most common problems and how to deal with them.

 

Slow Germination

If your seeds are taking too long to sprout, there could be a few reasons:

  • Not enough darkness during germination

  • Seeds not kept moist

  • Too many seeds in one tray

Solution:
Microgreens need a dark environment (blackout period) to germinate properly. Place your trays in a dark space or cover them. Keep the medium moist, not wet.

​

Not Enough Light After Germination

Once seeds have sprouted, they need light to grow strong and green.

Solution:

  • Place them in sunlight or under grow lights

  • Make sure all plants get equal light

  • Rotate trays if needed 

 

Overcrowding (Too Many Seeds)

Using too many seeds might seem like a good idea, but it causes:

  • Poor airflow

  • Weak growth

  • Higher risk of mould

Solution:
Give your microgreens space. Proper spacing = stronger plants.

 

Yellow Microgreens

During germination, yellow colour is normal. They haven’t had light yet.

But if they stay yellow:

  • Too much water

  • Not enough light

  • Wrong growing medium or fertilizer

Solution:

  • Move them into good light

  • Reduce watering

  • Avoid unnecessary fertilizers

 

Wilting Microgreens

Wilting usually means one of two things:

  • Not enough water

  • Too many plants competing

Solution: 

Water consistently and avoid overcrowding.

Tip: Bottom watering works best.
Use two trays: one with holes and one without. Fill the bottom tray with water so roots can absorb what they need.

 

Bad Smell

If your microgreens smell bad, something is wrong.

This is often caused by:

  • Overwatering

  • Poor airflow

  • Mould or stem rot

Solution:

  • Reduce watering

  • Improve airflow

  • Keep the growing area dry

  • ​

Seeds Clumping Together

Especially with seeds like chia, they can stick together and form a gel.

Solution:
Spread seeds evenly. Do not let them clump together.

 

Pests

Pests are rare indoors, but they can happen.

Common pests:

  • Aphids

  • Thrips

  • Whiteflies

They usually come from nearby plants or contaminated soil.

Prevention:

  • Keep trays away from other plants

  • Use clean, fresh growing medium

  • Never reuse soil

What to Do If You Already Have Pests

  • Check how bad the problem is

  • Remove affected plants if needed

  • Be careful with sprays (you will eat these greens)

Final Thought

Healthy microgreens come down to a few simple things:

  • Good airflow

  • Proper watering

  • Correct light

  • Clean growing conditions

Get these right, and most problems disappear before they even start.

bottom of page