Learn how to grow microgreens from seed, and you’ll have an unlimited supply of fresh, nutritious, and tender salad greens. They can be enjoyed whole, roots and all or simply trim with scissors. Microgreens are intended to be harvested when the first leaf pair (the cotyledon, or seed leaf) opens fully and turns green. This is the point at which your microgreens will be richest in nutrients. However, you can also let the seedlings continue to grow and harvest them as needed.
Microgreens are baby salad greens, a little bit like sprouts, but grown in soil. While sprouting seeds need to germinate quickly so the seeds don’t rot, microgreens can be planted just like any other herb or vegetable seeds. That means that seeds with longer germination requirements can still be grown as microgreens. Think of basil, carrots, spinach, and any other edible greens.
Follow the planting instructions on the back of your microgreen seed package. For instance, some seeds prefer to be sown on the surface of the soil, while others need to be covered. We recommend using sterilized seed starting soil in shallow trays that have drainage holes at the bottom. Using a seedling warmer will increase the speed of germination, but it is not strictly necessary. Spread the sterilized soil to a depth of only 2-3 inches. You’ll be harvesting the baby seedlings, so they don’t need a lot of room to grow roots.
Sow microgreen seeds fairly densely, a little less dense for large seeds like sunflowers or Swiss chard. Once your green seeds have been planted, mist the whole area. You want to keep the soil moist (like a wrung out sponge), but not sitting in water. Keep your misting bottle handy, and spritz the soil regularly, or cover your seed tray with a humidity dome.
As soon as the first sprout is visible above the soil, remove the tray from the seedling warmer (if using), and remove the cover (if using). Bright light is essential for growing microgreens. Indoors, in winter months, even a south facing window may not provide sufficient light for greens. Supplemental lighting will provide the best success. Our light stands are an all one stand w/light that can be set up quickly to provide light for any type of indoor seeding project, and come in two lengths; 2 and 4 foot. This bright light will help keep your microgreens short and stout. When light is insufficient, the sprouts will grow long and spindly.
Microgreens can be pulled from the soil and rinsed until all the soil particles have washed away. They can be enjoyed whole, roots and all. Or simply trim them with scissors and dispose of the used soil in your compost. Microgreens are intended to be harvested when the first leaf pair (the cotyledon, or seed leaf) opens fully and turns green. This is the point at which your microgreens will be richest in nutrients. However, you can also let the seedlings continue to grow and harvest them as needed. Be aware that the longer they are left to grow the more roots will also develop in the soil.