I dug initially to remove deep rooted plants- dock, Hemlock water dropwort, brambles etc. Now I target individual weeds. I aim to leave plants that I want, usually low growing herbs and salad plants, to seed themselves and block out any baddies that might have got there. This means I have rafts of parsley, mizuna, rocket lettuce etc. I am conservative about taking out plants even when other gardeners might feel they have “finished”, only taking them out or cutting them off when there is superior plant to put in its place.