Microgreens are simply greens, lettuces, and herbs that are harvested when they are quite young—generally when they are approximately an inch tall. They may be tiny, but microgreens are a huge trend, found everywhere from corner bistros to plastic-wrapped at the grocery store.
If you have shopped for microgreens, you know they are not cheap! The good news is that it's easy to grow your own microgreens, indoors or out. They provide you with a quick harvest for not much work.
You can add microgreens to salads, sandwiches, or stir-fries. Experiment with different mixes, adding the varieties you like best. They're definitely deserving of a spot in your garden and, if you're limited on space, they grow great in containers.
What Can You Grow as a Microgreen?
Basically, you can grow any lettuce, salad green, or herb as a microgreen. It's easy to start with a pre-packaged seed mix, and you can look for specific microgreen mixes, or simply choose a mesclun mix to grow as microgreens.
Here are a few popular varieties to grow as microgreens:
Microgreens are very easy to grow. You can grow them outside, in a garden bed or in containers, or inside on a sunny windowsill.
If you are planting microgreens in a garden bed, loosen the soil and rake it smooth. Scatter your seed mix so that the seeds are about 1/8- to 1/4-inch apart. Remember, you'll harvest them very young, so they don't need a lot of room. Once the seed is scattered over the area, cover it with about 1/8 inch of soil and water gently but thoroughly.
If you're planting in a container, choose a container that is at least two inches deep and as large in diameter as you want. Fill it with a good quality organic potting mix, and smooth the soil. Scatter the seeds so that they are about 1/8- to 1/4-inch apart, and cover with 1/8 inch of soil. Water gently but thoroughly, and place your container in a spot where it will get at least four hours of sunlight. If you're growing them indoors, a south-facing window is best, but an eastern or western-facing one will do as well.
In either case, do not let the soil dry out, and be sure to remove any weeds so that the tiny greens don't have to compete with them for water and nutrients. Since you'll be harvesting the greens so young, you don't really need to fertilize them while they're growing. If you have plenty of organic matter in your garden bed, that will be perfect.
For containers, mixing in a bit of granular organic fertilizer to the soil before you plant will work fine. This is especially true if you plan on using the same soil for several plantings of greens.
Microgreens grow for such a short period of time that they are rarely bothered by pests and diseases. However, if you are growing brassicas in your mix (mustard, kale, etc.) and cabbage worms are a problem, you may want to cover your microgreens with a floating row cover to protect them.
The first leaves you'll see are seed leaves. They don't look anything like the actual leaves of the plant. The best time to harvest microgreens is when they've developed the first set of true leaves, which is generally about 10 days to two weeks after planting.
To harvest, simply snip the microgreens just above soil level.
Unlike mesclun or baby greens, you won't be able to get additional harvests from one planting of micro greens. Because the plants haven't had much time to develop—and you're snipping off everything except the very bottom of the stem—the plant has no way to generate new growth.
The good news is that you can plant another crop after harvest by simply scattering fresh seed and covering it with soil. You don't even need to remove the old roots; they are good sources of organic matter.