- b) Soilless Method (broccoli, mustard)
Soak. Using a tray with drainage holes, rinse enough seed to cover the bottom of the tray. Soak the seed for 1-2 hours. Use a jar with a sprouting lid for soaking if the tray holes are too large. Drain, rinse and drain holding at an angle to remove excess water. Spread the seed evenly on the bottom of the tray and cover with a lid top and bottom or put in plastic bag.
Rinse. Rinse with cold water twice a day, using either a gentle flow from a tap, dipping in a sink, or spraying. Drain thoroughly.
Grow. The roots will form a mat from which the microgreens will emerge. At that point, put in indirect sunlight, florescent/LED lights or grow lights. The watering is then easy: fill the container 1 cm deep with water and allow to sit for a few seconds in the water and then tilt on an angle to decant the water until only some moisture is remaining remaining in the root area. Continue to rinse twice a day as described above.
Typically, microgreens grown without soil are harvested at 7-10 days. Harvest before the next expected rinse so the shoots are dry. Harvest before the next expected rinse so the shoots are dry. Harvest microgreens using scissors or knife.
Instead of harvesting all at once, you can start to harvest microgreens as soon as the first two leaves are spread out. Take only what you need for your meal and allow the rest to keep growing or put the tray in the fridge loosely covered and a plastic bag or dome to harvest another day.