The whole window will have a one foot wide window sill. I will have to show you the place to get a good idea of things. Basil planted in teacups for the kitchen, cheap and pretty teacups planted with fresh herbs on the window sill.
Need a raised garden bed? Here is an idea that’s easy to do, beautiful and essentially free! Build your own elevated flower/garden bed by weaving branches and twigs - a wattle raised garden bed. You(Garden Step Ideas)