Since ancient times, companion-planting has been used against bugs by organic gardeners. In general, the vegetable garden should be planted as close as possible to the herb garden because the herb garden is a collection of many companion-plants. He offers the following tips to incorporate the principles of companion-planting in your growing spaces. Try combinations of garlic, garlic chive, onion sets, Bermuda or Spanish onions and leeks around the borders. Too many marigolds, however, will interfere with vegetable production.
Basil repels white flies and mosquitoes.
Basil, as a companion-plant, works well with cucumbers and squash, too. Thyme wards off the cabbageworm. Rosemary and sage repel the cabbage moth, bean beetle and carrot fly. Both these herbs are flavorful culinary additions to a broad range of recipes. Nasturtium, usually planted in the garden for its bright blooms, have more than one purpose.