How To Grow Microgreens: Easy Fresh Food Indoors

mature microgreens in planting tray
Have you tried growing microgreens indoors? Yummy and nutritious, these seedlings of favorite garden crops are quick to sprout and harvest to top salads and sandwiches, swirl into smoothies, and sprinkle on pizza, soup (whatever!). Essentially, the ultimate instant gratification crop.
man at picnic table with tray of microgreens
To show us how, we hooked up with Austin Davenport, a community gardener and local garden educator who grows microgreens in his apartment.
coconut coir in tray next to mature microgreens and newly sprouted ones
The advantage to microgreens, he tells us, is that you don’t need a yard or a big investment in equipment. You can even grow in repurposed containers (like berry containers)—anything that’s 2-3” deep as long as you punch in drainage holes. Austin prefers growing in 10” x 20” inch nursery trays (there are countless options in garden centers and online).
raised bed of stones filled with herbs
Cold or wet days don’t matter, either. It was 39° when we met him at the Deep Roots Garden, a community garden project of Whole Foods Market, where Austin has a plot.
young winter vegetables
But when last week’s drizzling chill scooted many gardeners inside, microgreens made for comfy, cozy gardening.
twine woven through holes in black nursery tray
He explains how to sterilize our trays between crops and weave twine through drainage holes for bottom watering when the seedings are 5-6 days old.
seeds in coconut coir and tray of mature microgreens and a tray of sprouted ones
Austin’s preferred growing media is coconut coir. “It’s inert and it doesn’t have any sort of fungus gnats or microbes. I can put this whole tray into the fridge without having to worry about introducing any sort of dirt and contamination in my fridge.” Before planting, moisten it to be about like a wringed out sponge. It’s easier to do in a large bowl, bucket, or trug if available.

So, what can you grow? Mix up your flavors with seeds from peas, leafy greens (including mustards), cole crops (cabbage, broccoli, brussels sprouts, kohlrabi, collards), lentils, and spicy radishes—basically, many plants you can grow to full-size harvests in garden beds. Seed them generously in a single layer, especially in the corners to support the center plants and keep them straight.
man watering tray of seeds with watering can
Water them in. “And from here, we’re going to check on the seeds at least once a day to make sure that there’s good germination, nice and damp surface. And we’re also going to put another tray on top of it just to keep out all the light,” he notes.
man at picnic table with tray of microgreens with camera and light near him
“We want the seeds to grow devoid of any light, and that will help them grow straight upwards. After a few days of where we see good germination and straight yellow seedlings, we’ll move these to a light source.”
Gardening Under Lights book cover
That can be a bright windowsill, but ideally you want to use grow lights like T5 or others. Leslie Halleck analyzes all the options in Gardening Under Lights.
man holding up planting tray to show wicking twine strings
At about 5-6 days old, the roots are long enough to add about 1” of water to the tray and let the wicks water the sprouting plants from the bottom up. Austin explains why: “We want to use the bottom watering method for two main reasons. The first being to discourage any sort of fungus development on the surface. We want to water from the bottom up, not the top down, to try to keep the surface as dry as possible. And that’ll help prevent any sort of molds developing on your microgreens. And we also want to have good air circulation in the room with these, and that’ll help prevent any sort of mold to developing on the top.”
mature microgreens and sprouted ones
To harvest, use snips or scissors to cut right above the soil. “After about 10 to 14 days, you’re ready to harvest food that you grew yourself. These greens are incredibly delicious. They’ll last you quite a long time, a lot longer than a packet of salad mix from the store.”

Follow Austin Davenport on Instagram for his latest tips and talks.

Watch now for lots more!

Thanks for stopping by! Linda