Wong Bok (白菜) planted in end summer and autumn this year in our place has all bolted. None of them produce compact heads. We just pulled them out from where they were growing to make some space for spring planting later.Then temporarily put them in polystyrene boxes for composting later. To our surprise those disposed wong boks are very determined to produced flower for reproduction purposes after being dumped.
Happily growing without any soil after being dumped in the polystyrene box. Can it be that moistures from amidst layers of dead leaves sustaining the wong bok .The reason it is able to be still growing and producing flowers.