Hemp and marijuana are the same plant, it just depends on how you grow it as to which way it develops. I don't think it's unreasonable, but I do think you'll have to be prepared for a bit of a reaction from people. Especially if you just "happen" to grow it the wrong way for hemp.
From what I remember from university, where I had the coolest class in the world, called "Drug Plants of the World", one grows in poor, dry soil, the other grows in moist, fertile soil. But I don't remember which is which.