Tah tsai is a popular variety of Tatsoi, which belongs to the Mustard genus (Brassica narinosa 'Tah tsai').
Tah tsai Tatsoi needs a moderate amount of maintenance, so some level of previous experience comes in handy when growing this plant. Ensure that you are aware of the soil, sun, ph and water requirements for this plant and keep an eye out for pests.
This variety plant info is provided by the myfolia gardener's wiki. All details about Tah tsai have been kindly provided by our members.