Remember, if you are going to eat any part of the nasturtium, do not spray or dust it with insecticides. Cut the blooms and leaves early in the morning when they are high in water content. Wash the petals and leaves in lukewarm water, and dry them with paper towels as you would salad greens. Fall-planted nasturtiums may need a cover during a hard freeze. But, often, bedding plants are put in the garden in early spring, and they will flower until the heat takes them out.
Nasturtium flowers are red, pink, orange and yellow to creamy white.
Butterflies love them. Drought-tolerant nasturtiums like sun or partial sun. Avoid high-nitrogen fertlizers. The plant will grow 1-2 feet in height, but there are trailing and dwarf varieties, also. Catnip seems to be easily grown by everyone but me.