Radish - Plant with climbing beans, and both grow better. Plant with lettuces, and the radishes become more succulent in summer time. Also plant with peas, nasturtiums and cucumbers. Deters cucumber beetle and other insects. Rose - Planting chives or garlic with roses protects them from black spot and some pests, including aphids.
Parsley protects roses from beetles.
Rosemary - Grows well with sage, improves growth of carrots, cabbage and beans. Don't grow near potatoes. Rue - Hates basil. Plant near roses, strawberries and fig trees. Effective fly repellent and it repels dogs and cats which hate it.