I have used the same technique that I have used in my Pomegranate quilts, working on the placing and light and dark fabrics.
Whatever I decide I am keen to continue working in grids and follow the repetition idea.
Here is my turnip quilt. When the quilt was on show recently at the NEC most people seem to think they were beetroots. It doesn't really matter.
I have used commercial Batik fabrics and transfer adhesive.