Nasturtium is very easy to grow if your soil is not very hard and clay. You can water it every day or once a week - it does not matter. It will grow, and trail all over, and the next year its seeds will grow all over your garden. You can add the tangy leaves, but especially the flowers to salads, and you can use the fresh seed pods in place of capers. The flowers come in yellow, orange, red, purple, cream purple and black velvet.