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Growing Microgreens in the Flex Micro

Part 3 of 4: A guide on growing microgreens in your Flex Micro

Materials Needed (Included in the Microgreen Starter Supply Box)

  • Measuring Cup
  • Measuring Spoons
  • TDS Meter
  • pH Test Kit
  • pH Down
  • Nutrient A & B
  • Potable Water (Pitcher or Hose)

Growing Microgreens in your Flex Micro

Once the microgreens are germinated and placed in the Flex Micro, the growing process becomes mostly hands-off—simply monitor your tank's water, nutrient, and pH level (takes around 10 minutes per week!). Most microgreens are typically ready to harvest 7 to 14 days from seed.

While the microgreen trays are growing in the Flex Micro follow the below guide:

  • Flex Micro Setup: Ensure that your Flex Micro is set up and operating correctly according to the Flex Micro Setup Guide.

Always place a non-perforated tray in any unused tray slots to keep the irrigation system fully contained and minimize the risk of contamination and helping to prevent algae growth. 

  • Lights: Each shelf has its own light control. Keep the light on 24/7 for any shelf with plants growing. Use the switch located at the top right back corner of each shelf to turn the light on or off as needed.

If there are no plants growing on a shelf, remember to turn the light off for that shelf. This helps prevent algae growth and significantly reduces the effort needed for post-harvest cleanings. 

  • Pump: Your pump should be set to be on for 15 minutes every 8 hours (refer to Flex Micro Setup Guide for more details).

We recommend checking your Flex Micro tank’s water, nutrient, and pH levels at minimum twice each week. These routine checks and adjustments usually take just 5–10 minutes. Start by checking all levels—water, nutrients, and pH—note any adjustments needed, then make those changes.

Tip: If you need to add more than a few gallons of water, slightly increase the amount of pH Down and Nutrients A & B you add, as adding water raises pH and decreases nutrient concentration.

  • Water Level: Add water each week and ensure the tank water level does not fall below the bottommost indent in the tank. 

Depending on the number of plants in your Flex Micro, you may need to add 2–8 gallons of water each week. For convenience, use a hose to refill the tank, or a pitcher if a hose isn’t available. Always use potable water.

 

To test the pH and nutrient levels in your Flex Micro water, remove the tank lid plug and insert your TDS meter into the water, and/or use the vial from your pH test kit to collect a water sample.

  • Once the true leaf appears, it is time to harvest. This typically happens within 7 to 14 days from seed for most microgreens. The true leaves are mini versions of the plant's mature leaves and they look distinctly different from the simple, smooth leaves (cotyledons) that first emerge from the seed. 

Your microgreens are now ready to be harvested—well done! Continue to Part 4 of 4: Harvesting Microgreens for next steps.