Do you want to grow large cabbage? So...

Do you want to grow cabbage heads weighing up to 10 kg? So let me tell you the whole trick.
When the heads form in mid-summer, remove the lower leaves. The heads will be larger.
It is better to do it in sunny weather when the leaves are slightly wilted.
When the weather is cloudy, the leaves are very brittle and the wounds can get infected.
Therefore, break off the leaves in dry sunny weather, and you will have a great yield!