Pak Choi

My dad has been growing Pak Choi in his garden this year and I got the first lot to try as I love it! It tasted great, but it is not nearly as big at the bulb as the ones I have been buying at Tescos for the past month. Any gardeners out there know how to grow them larger ?

Id like to take this opportunity to say that another blipper told me that if I wanted to reply to comments I have on any day, to click on the small arrow at the side for them to know I had replied to their comment. As I have not been doing this some of you may think im very rude and have not replied to you. I would like to apologise to you all now, as I thought I just had to comment at the bottom of my comments for you to see my reply.