Order Autumn Flowers For Delivery In Orange County California. Autumn flowers available in yellows, oranges and reds. These floral arrangements are created using orange and red roses and seasonal flowers including Marigolds and sunflowers. Let us create a stunning thanksgiving centerpieces or a traditional autumn themed floral arrangement for any occasion. Tulips are also available starting in the fall and can be included in many of the fall themed floral arrangements being delivered in Orange County California.