I don't know about white marigolds, Teresa. I hope you find some. They would be pretty! I'm interested in finding dwarf daisies. I have Shasta daisies that grow taller than my daylilies. They completely miss the point of being companions! I have heard about dwarf daisies that bloom all summer, but haven't found them yet. I would think that white marigolds would do a fine job, too!