Many a year my neighbours are regaled by the sight of vegetable plants in among the shrubs and flowers in my front garden, even though the back garden has enough to feed a regiment. I too fall victim to the wonderful variety available, but it pays off when you get lovely surprises like the huge tubers of "Swift" potatoes which boiled and sauteed are to die for, so early in the season.
The Kenya bean "Safari" gives you basketful after basketful. Anyway, sweetcorn plants are pretty in themselves and red banaha shallots are beautiful.