An orange strawflower is a bright flower that can grow up to 4 feet tall. Strawflowers come in many different colors, so buy the seeds that will yield orange flowers.
Orange zinnias are striking flowers that bloom from midsummer to the first frost of the year. This flower can grow to be 3 feet tall.
Marigolds are smaller flowers, usually topping out around 1 foot. Marigolds are similar in appearance to daisies, with colors ranging from creamy yellows to deep oranges.
Another smaller flower, the orange gerbera daisy is a relatively easy plant to grow. Orange gerbera daisies prefer full sun, but they also grow well in light shade.
Orange Dahlia flowers can grow to be 5 feet tall, so they are ideal if you are looking for a large orange annual flower. In most conditions, orange dahlias are annual flowers, but in certain areas (zones nine and 10) they act as perennials.