Plants will either form a low bush or trailing plant eight to twelve inches tall. Trailing plants may extend almost a yard. They make a great informal display as a ground cover or along fences. Trailing varieties look great in hanging baskets.
The Empress of India particularly has a dwarf, bushy habit so it would looks great as a border. This plant was introduced during the Victorian Era and was very popular. Now you can't get more classy than that
If you do decide to go with nasturtium know that frequent picking prolongs the flowering period, so cut flowers often. Flowering season can last into autumn, and the plants self-seed readily.
Also nasturtiums are an attractive and nutritious addition to salads, and they make a beautiful garnish. Nasturtiums have 10 times the vitamin C of lettuce, so add a generous portion of leaves and flowers to your salad mixes. Grind the seeds in a pepper mill, and use as you would black pepper.