fresh greens in the winter.
Select a shallow plastic container with drainage holes, such as a nursery flat or prepackaged-salad box (either clear or opaque plastic boxes work). Fill the container with 1 1/2 to 2 inches of moistened potting mix. Cut a piece of cardboard to fit the container. Gently press the cardboard onto the soil to create a flat, even surface.
For microgreens, a good choice is mesclun seed, like "Paris Market Mix" and "Asian Baby Leaf Mix" from Renee's Garden, because each seed packet contains a blend of different greens, and they tend to all sprout at the same time. Single-crop microgreensalso work. Sprinkle the seed evenly over the soil surface, aiming to space the seeds 1/8 to 1/4 inch apart in all directions. Place the cardboard over the seeds and lightly press them into the soil.
Using a wire-mesh strainer, sift a very fine (1/8-inch) layer of dry potting mix over the seeds. Set the container onto a drip tray and then carefully water the seeds in with a gentle shower from a watering can. Place the tray in a sunny, south-facing windowsill or under grow lights. Expect the seeds to germinate in 3 to 7 days.
Keep the soil consistently moist. Prevent soggy soil by pouring out any excess water that collects in the drip tray after watering.
HarvestTo harvest, snip the microgreens off right above the soil line when their first true leaves unfurl (about 7 to 14 days after germination, depending on the green). Use these nutrient-dense microgreens in salads or as a garnish.
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