Growing mizuna using indoor hydroponics
Mizuna, also known as Japanese mustard greens, is a great plant to grow using indoor hydroponics. They have a slightly bitter, crisp taste and can be used for a wide variety of dishes such as salads, stir-frys and hot-pot.
As far as growing them hydroponically, they grow very quickly and are tolerant of a very wide range of temperatures. I have grown them in the dead of winter and summer, and they grow equally well, without bolting. Individual leaves can be harvested from the outside-in, and the plant will keep producing more leaves from the center. If you like the flavor of this great vegetable, this is definitely a great addition to your indoor hydroponics garden.
You can follow a standard procedure for growing mizuna. Seeds can be planted in rockwool cubes until seedlings emerge. After transferring them to net pots and in deep water culture tubs, they will begin to grow very quickly.
Mizuna seedlings recently transplanted.
Mizuna plant several days after transplanting. You can see vigorous growth happening from the center of the plant.
Fungus gnats can become an issue, but typically do not cause any harm to the plant.
Nutrient and light requirements
Mizuna plants are extremely hardy and can tolerate both low and high nutrient concentrations. I typically try to keep PPM between 800 - 1200 PPM. At lower ranges, they will grow slower, and at higher concentrations, I have noticed some minor tip-burn. In general, however, they grow very well and will continue to produce new leaves. I have several plants that have been going for almost a year.
The base of this plant has almost outgrown the net pot. Notice the nubs from prior leaf harvests - these will eventually die off and require pruning to prevent significant accumulation of dead plant matter.
Unlike lettuce, mizuna plants are very resistant to bolting, and tolerate limited light conditions relatively well. For best results, I recommend providing at least 1000 lux.