How to Grow Microgreens Indoors

Go from seed to harvest in just a handful of weeks with this guide on how to grow microgreens indoors.

Wooden Pots
Project Overview
  • Working Time: 1 hour
  • Total Time: 3 weeks
  • Skill Level: Kid-friendly

Among the easiest and fastest-growing crops, microgreens offer a palette of fresh flavors, from mild to spicy, and inspire repeated plantings for an ongoing supply of fresh greens for creative uses. 

These teensy microgreen seedlings are grown for harvest at a tender stage and are perfect for a windowsill garden. They're ready for harvest and can have their stems snipped after only two to three weeks of growing. If left to grow, microgreens become young seedlings and then full-fledged plants.

To grow microgreens indoors, you'll need potting mix and bright light. Flavors range from intense, like a full-grown plant, to subtle.

What You'll Need

Equipment / Tools

  • Garden trowel
  • Watering can


  • 3-inch peat pots or other suitable containers
  • Soiless seed-starting mix
  • Vermiculite
  • Seeds
  • Plant labels
  • Plastic wrap


  1. Watering Soil

    Dampen Soil

    To get started growing microgreens indoors, remoisten the soilless seed-starting mix, a sterile medium formulated to promote seed development. Do this by sprinkling warm water onto the mixture and blending until it is thoroughly damp.

  2. Potting Seeds

    Fill Containers

    Fill each container with premoistened seed-starting mix. There's no need to pack it into place—packing the container too tight will lead to drainage issues. Set the container on a watertight drip tray or saucer.

  3. Planting Microgreens

    Sprinkle Seeds

    Sprinkle seeds evenly over the surface of the seed-starting mix, sowing them more thickly than you ordinarily would. Leave at least 1/4 inch of space between the seeds.

  4. add vermiculite to containers above soil

    Cover Seeds

    Cover the seeds with vermiculite. This mineral-based material absorbs water and releases it slowly, keeping seeds damp but not too wet. Follow instructions for planting depth provided on the seed packet. Some seeds should be barely covered; others need thicker covering to germinate (sprout and grow). Label plantings.

  5. gently shower seeds with water after sown


    Water the sown seeds with a gentle shower, soaking the vermiculite without washing away the seeds. Water lightly as needed to keep the seed-starting mix damp until the seeds germinate and green shoots sprout. If the mix is too wet, seeds can't root and fail to grow.

  6. Labeled Seeds


    Cover the containers with a lightweight sheet of plastic or a doomed lid to maintain humidity and promote germination to encourage the best growth of microgreens indoors. Set the drip tray on a heat mat designed for seed starting or on a heating pad.

  7. Watering Microgreens

    Care for Plants

    When the seeds germinate, remove the lid and the heat source. Set the containers on a sunny windowsill to help your microgreens grow indoors. Keep the planting medium damp, and promote healthy growth by watering from the bottom. Pour water into the tray and allow it to be absorbed into the soilless mix.

  8. Harvesting Microgreens


    To harvest the microgreens, hold a section with one hand and use the other to snip with scissors. Keep your microgreens cool and in an airtight container until you're ready to use them. Their shelf life in the refrigerator is about a week.

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