Is there any biological distinction between herbs and weeds? I always think of a weed as merely a plant you don't want in a particular place, and/or one you don't (yet) know how to use. But perhaps there is a real difference?
After I cleared all the plantain weed out of my lawn and flower beds, I learned that they actually have uses similar to comfrey. So now I have it planted in my herb bed; though it is a pity it's not got more attractive flowers. Dandelions, which are so bright and cheerful, are good tonic for the liver, and the flowers can be battered and fried into donut holes with the kids
I use lavender, calendula, comfrey, and plantain in healing salves and hand cream. I'm looking for uses for sage, chives, lemon balm, dill, nasturtium and false strawberry. And real strawberry!