Pak choi is a vegetable that consistently causes me problems as it never seems to germinate on my plot, however, as I had the remains of a packet from last year the remaining seeds were sown 25th April.
02/05/2015: A fresh packet of Pak Choi, crunchy colour mix was purchased and a few of the seeds sown in a small seed tray. I intend to try further sowings directly onto the plot later in the year.