Nasturtiums are more than just pretty flowers. They are friendly forces in the garden.
Nasturtiums repel squash bugs, borers, striped pumpkin beetles, cabbage moths, potato beetles, and whiteflies, and they attract aphids, which eat them and then die. They also attract aphid predators, which finish off the aphids on the nasturtiums as well as your neighbouring plants. Plant them around your tomatoes, cucumbers, asparagus, brassicas, lettuce, pumpkins, radishes, squash, fruit trees, and any other plants that are vulnerable to these pests (except for cauliflower). You can also use them to make an aphid spray.
There are tall (8 to 10 feet high) vining varieties, and dwarf varieties of nasturtiums, and variations in-between. They’re easy to grow in a sunny spot in your garden or in containers. They produce almost pea-sized seeds which are easy to collect for the next year. All parts of this plant are edible (they have a peppery flavour). The blooms and greens are commonly eaten in salads, as garnishes, or as a replacement for capers, and the seeds may be pickled.