How to grow Microgreens without Substrate

1. Soak the Seeds

• Soak whole seeds for 8-12 hours in clean water.
  • Calgary tap water works absolutely fine and you actually do want the chlorine in it. Chlorine helps kill the bacteria on the seeds.
• Drain and rinse them well to prevent mold.

2. Prepare a Tray or Mesh

• Use a perforated tray, fine mesh, or a hydroponic screen to hold the seeds.
• A wire rack, plastic grid, or mesh from a garden center works well.
• Ensure good airflow to avoid mold.

3. Spread the Seeds Evenly

• Place a single layer of soaked seeds on the tray.
• Avoid overcrowding, as it can cause rot.

4. Keep Moist & Dark for Germination

• Cover the tray with a lid or another tray for the first 2-3 days.
• Mist or lightly rinse the seeds 2-3 times daily.
• Maintain humidity but avoid standing water.

5. Introduce Light

• After 3 days, expose them to indirect light.
• Continue misting or rinsing with clean water.

6. Watering & Nutrients (Optional)

• Rinse daily with clean pH'd tap water or a diluted hydroponic solution.
• Most microgreens don't need many nutrients but can benefit from a kelp extract such as Mega Mass - Kelp Mii. 

7. Harvest

• In 7-10 days, when they reach 3-6 inches, harvest by cutting just above the root line.
• Rinse and use fresh.

Tips to Prevent Mold

• Ensure good air circulation (a small fan helps).
• Rinse with cold water regularly to prevent bacterial growth.
• Use food-grade hydrogen peroxide (diluted) or a mild vinegar solution if mold appears.