Companion Planting: Plants that assist each other to grow well, repel insects or even other plants when grown next to each other can be a sustainable and eco-friendly way to improve and protect your garden against unwanted pests.
Nasturtiums have beautiful flowers and a low, bushy habit. They do not get bigger than 24 inches and make an attractive decorative plant in borders and hanging pots, but they also make an effective companion plant.
Nasturtiums planted with squash will repel squash bugs, but the nasturtium must be started well before the squash in order to flower when you need them too since squash grows so fast. In a greenhouse, nasturtium will repel white flies and when planted next to broccoli will keep aphids away. This colorful benefactor will also benefit potatoes, radishes, cucumbers and any member of the cabbage family. When aphids see the yellow color of the nasturtium blossom they will avoid it. This is something to keep in mind since nasturtium come in several different colors from reds to oranges.
Also, did you know you can eat the leaves of the nasturtium plant? They have a slightly radishy flavor and are good in salads.