How to Grow Arugula Microgreens

Опубликовал Admin
26-06-2021, 06:40
Microgreens are tiny leafy vegetables that you can quickly grow indoors all year round. They’re packed full of vitamins and nutrients and can be used as ingredients or garnishes in all kinds of dishes. Arugula seeds are one option that you can use to get started growing microgreens. With a few basic indoor gardening supplies, sun, and water, you can have your very own arugula microgreens in about a week! You can even grow microgreens hydroponically as an alternative to growing them in soil. Try adding arugula microgreens to a green smoothie, a salad, or use them to top pizza and soups.

Planting the Arugula

  1. Fill a container with organic potting soil mix. Use any type of planting container that is at least 2 in (5.1 cm) deep and has a drainage hole in the bottom, such as a propagation tray or regular plastic or clay plant pot. Fill your chosen container up to the brim with an organic potting soil mix, then level it out and pat it down lightly.
    • Any commercial organic potting soil mix from a garden supply center is good for growing microgreens in. However, if you want to make your own organic potting soil, you can combine about 3 parts peat moss, 1 part sand, 1 part perlite, and 1 part compost.
    • You could also make microgreen growing containers out of plastic deli tubs. Just be sure to drill or poke holes in the bottom for drainage.
  2. Sprinkle arugula seeds directly onto the surface of the soil. Use your fingers or an herb shaker to sprinkle the seeds onto the soil. Make sure they are evenly distributed all over the top of the soil.
    • You don’t need to worry about the exact amount of seeds you use, as long as you distribute them evenly across the soil.
  3. Spray the seeds with water using a spray bottle. Fill a clean spray bottle with cool water. Spray down the entire surface of the soil and seeds until it is evenly moist.
    • Don’t ever completely soak the soil to get your seeds started. Just lightly mist the whole top layer of soil and seeds.
  4. Cover the container with something dark. Place a piece of aluminum foil or flip over another container on top of the container with the soil and seeds. This creates a blackout dome to block out light and simulate the seeds being buried in the soil.
    • For example, if you used a propagation tray to plant your arugula microgreens, you can just flip over another same-sized propagation tray on top of it to create a perfectly-sized blackout dome.

Germinating the Seeds

  1. Check on your seeds every day until they start sprouting. Uncover the container with the arugula seeds once a day to see if the seeds are germinated yet. Feel the soil gently with your fingertips to see if it is moist and inspect the soil and seeds for any mold.
    • It usually takes about 2-4 days for arugula microgreens to germinate and start growing.
  2. Mist the seeds and soil with water if it feels dry. Use your spray bottle to moisten the soil if it dries out while the seeds are germinating. Try to keep the soil moist but not soaked.
    • If conditions are super dry where you are located and the soil is drying out quickly, pour water carefully onto the soil from a cup or watering can to keep it moist, rather than using a spray bottle.
  3. Remove the blackout dome if there is any mold on the soil or seeds. Gently scrape off the moldy bits with a spoon and discard them. Remove the foil or other cover and leave the container uncovered. Don't put the dome back on.
    • This will reduce the humidity to prevent the mold from taking over.
  4. Place the container by a sunny window when the seeds start to sprout. Watch for spindly sprouts coming out of the seeds to know when the seeds are germinated. Remove the blackout dome and put your container on a sunny window sill or another flat surface near a window.
    • Don’t worry if the sprouts look yellowish. It’s because the arugula hasn’t been exposed to the sun yet, so it hasn’t started photosynthesizing. They’ll turn green after 1-2 days of sunlight.

Caring for and Harvesting the Microgreens

  1. Water the arugula daily to keep the soil moist. Switch to regular watering once the microgreens are in a sunny spot. Thoroughly water the soil by pouring water directly onto it from a cup or watering can.
    • Adjust the amount you water based on the climate you are in. For example, if the climate is cold and wet, you might only need to water every other day.
  2. Wait about 7-14 days to harvest the microgreens. The arugula will be about 1 in (2.5 cm) tall after the first week of growth. Let it grow longer if you want the microgreens to be on the bigger side.
    • Anything between about 1–3 in (2.5–7.6 cm) tall is considered a microgreen. If the arugula gets taller than this, it would be considered baby greens.
  3. Cut the arugula 0.5 in (1.3 cm) above the surface of the soil to harvest it. Use a sharp knife or scissors to cut the microgreens near the base of the stems. Aim to leave behind about 0.5 in (1.3 cm) of the stems in the soil. Be careful to slice all the way through the mass of arugula so you don’t accidentally pull up any soil or seed hulls.
    • If your arugula is in a small container, you can lift it up and turn it sideways over a bowl, then slice straight down through the stems so the microgreens all fall off cleanly into the bowl.
    • Microgreens do not typically regrow after you harvest them, so once you cut the arugula off the stems you will have to plant new microgreens.

Growing Arugula Microgreens Hydroponically

  1. Soak a hydroponic grow mat with water and put it in a grow tray. Choose a hydroponic grow mat, such as a coconut coir mat or a hemp mats. Soak it in a container filled with water or place it in a container and pour water on it until it is saturated, then lift it out and let the excess water drain off. Place it into a hydroponic grow tray.
    • This is an optional method you can use instead of planting arugula microgreens in soil.
  2. Sprinkle arugula seeds evenly over the grow mat and mist them. Cover the grow mat substrate with an even layer of arugula seeds. Use a spray bottle to lightly mist them with water.
    • From here on, the process for growing arugula microgreens hydroponically is the same as growing them in soil.
  3. Cover the grow tray with another upside-down grow tray. Flip over an identical 10 in (25 cm) by 20 in (51 cm) grow tray on top of the tray containing the hydroponic grow mat and seeds. Keep the tray covered with this blackout dome to block out the light and make the seeds germinate.
    • Don't uncover the seeds more than once a day. The idea is to simulate the conditions of them being buried underground so that they will start to sprout.
  4. Germinate and care for the seeds as if they were in soil. Check on the seeds and mist them once a day until they start to sprout, then leave them uncovered in a sunny spot or under some grow lights. Keep misting them daily until they are at least 1 in (2.5 cm) tall, then harvest them using a sharp knife or scissors.
    • Remember that the arugula needs 4-8 hours of sunlight per day to grow and the microgreens will be ready to harvest after about 7-14 days.


Things You’ll Need

  • Container
  • Potting soil
  • Aluminum foil or extra container
  • Spray bottle
  • Water
  • Cup or watering can
  • Knife
  • Hydroponic grow mat (optional)
  • 10 in (25 cm) by 20 in (51 cm) grow tray (optional)
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