HJL,
Regarding your question regarding cooking oil that doesn’t stand out like sunflowers, I researched oil seeds for producing biodiesel. Canola rapeseed oil was the highest yielding and some varieties are grown for cooking oil. Some are genetically engineered so you need to find the right variety, but it grows well in Washington and British Columbia. It’s a brassicus with a yellow blossom so can be mistaken for wild mustard by passersby. – M.W.