Microgreens may be tiny, but they've become a huge trend found everywhere from corner bistros to plastic-wrapped at the grocery store. And if you've taken a look at the prices, they are not cheap! The good news is that it's easy to grow your own microgreens, indoors or out.
What Are Microgreens?
Microgreens are simply greens, lettuces, and herbs that are harvested when they are quite young -- generally when they are approximately an inch tall.
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:
How To Grow 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, we're harvesting 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 of an inch of soil and water gently but thoroughly.
If you're planting in a container, the first step is to 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. Because you'll be harvesting the greens so young, you don't really need to fertilize them while they're growing. If you've got 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, especially if you plan on using the same soil for several plantings of greens (more on this below.) 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 best time to harvest microgreens is when they've developed their first set of true leaves (the first ones are seed leaves, and don't look anything like the actual leaves of the plant), which is generally about ten 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. You can plant another crop after harvest by simply scattering fresh seed and covering it with soil. You don't need to remove the old roots; they are good sources of organic matter.
As you can see, microgreens are simple to grow and provide you with a quick harvest for not much work. You can add them to salads, sandwiches, or stir-fries, and it's much cheaper to grow your own than it is to purchase them. Experiment with different mixes, adding the varieties you like best. They're definitely deserving of a spot in your garden.