Sunflowers are a perfect choice for the Florida gardener as they are remarkedly easy to grow, and native varities love the summer heat. These cheerful beauties come in a wide range of sizes and come in a variety of warm colors.
Sunflowers grow rapidly, and some species can reach a height of eight feet or more if conditions are right. There are dwarf varieties and a wide range of colors and flower styles to choose from.
When people think of sunflowers, the huge sunflowers that usually come to mind are Helianthus annuus. These are short-lived annuals with large, striking flowers. Most garden cultivars are 4 to 5 feet tall, though some types can grow to 12 feet tall. The familiar flowers have yellowish petals with a brown central disc, and grow to 6 to 12 inches across. Plants are seeded in late winter to early spring in Florida, produce lovely flowers in mid-spring and decline quickly in the heat by late spring to early-summer. Plants in Florida installed in the fall can produce a nice flower display for several weeks in the fall. A recommended cultivar for Florida is 'Valentine'.
Swamp sunflower (Helianthus angustifolius), also called narrowleaf sunflower, is a native perennial. You can often see it growing wild in the marshes and wet flatwoods of northern and central Florida. It only grows grow four to six feet tall.
Even shorter is the beach sunflower (Helianthus debilis), another Florida native perennial. This butterfly-attracting groundcover is perfect for hot, dry sites, including coastal areas.
Sunflowers will tolerate many different soil types and do best in sunny locations. Plant your sunflower seeds during the warm months, and keep in mind that you may need to stake the taller varieties.
- Helianthus angustifolius Swamp Sunflower (PDF)
- Helianthus annuus 'Sonja' Sonja Sunflower
- Helianthus debilis Beach Sunflower