I’ve not had any luck with bok choi either. So sad, I really like it. I planted just a little mustard this year under the grape arbors and it’s doing very well up there. I really enjoy using it on the few late season blt’s. I use it in place of lettuce. Quite tasty. I’m looking forward to planting a lot more next year. And even better, Bambi and family hasn’t messed with the grapevines with the mustard, oregano and lavender planted next to them.