I could probably plant a basket willow by my fence; though I live in the city, I have a little courtyard with some garden space, and it's pretty damp here. If not right near my house, then I bet I could pop a basket willow in the ground in the nearby wild space, Everett Crowley Park, and no one would notice; it used to be a dump so the biodiversity there is very high, and there are damp gullies that would suit willow.
But once I harvested my willow, where would I store it and dry it? not in my bike closet, which is already full. Perhaps in the kids' closets?
Therein lies the challenge of being an Urban basket maker: space is at a premium, so one has limited capacity to process and store much raw material. My studio is already festooned with as much lily as it can take; where would I put large bunches of willow?
So, for now at least, I'm working small; and working with materials that are more commercial and urban, and easy to store: wood veneer, bark, felt, and the plentiful lily leaves collected from gardens. My practice is fit to my resources, much as Garliq teaches not just herbalism, but a practice that is tailored to meet the needs and fit the resources of urban people.
I am still working on the 'meeting the needs' part.