Potato Friends Bush Bean Fava Bean Nasturtium Kohlrabi Caraway Corn Horseradish Peppermint Spinach Marigold Catnip Foes Pea Cucumber Pumpkin Beetroot Celery Sunflower Tomato Onion Notes Horseradish keeps the potato beetle away. Tagetes (marigolds) and spinach prevent bulb and leaf rot. Coriander and caraway have a positive effect on the flavor of the potatoes.
