Remember those mini choys don't attain much size. Once they start to bolt they are finished. As for planting them earlier, they will not stand freezing temps. I direct sow, so I ahve experience transplanting them. This one is New Nabai

When bok choi bolts, it bolts fast. It's the first green to bolt in my garden and it never gets bigger than 4 inches high. I set out seedlings in the garden 2 weeks ago in full sun. They probably have another 2 weeks to go before I take them out. They are being munched on by some bugs, so I think this is the last year I waste any time, effort and money on bok choi.

True the harvest window is relatively short but I get pretty good results direct seeding standard size varieties . Joi

There are some that tolerate warmth better - look for the ones from Southern China - Shanghai and Canton. .

Mine was planted in October, grew and was harvested until about March, when it bolted.

Thanks, all.

Maybe I'll try again starting in early September....