The age of the city's population distributed as 28.5% under the age of 18, 10.8% from 18 to 24, 30.8% from 25 to 44, 19.4% from 45 to 64, and 10.4% who are 65 years of age or older. The median age is 32 years. In San Antonio, 48% of the population are males, and 52% of the population are females.
Marigolds (Tagetes spp.) include both hardy annuals and perennials that require little care. These flowers range in size from 6 inches to 6 feet tall with flower color ranging from pale yellow to orange, gold and a brownish-maroon. Marigolds are easily propagated from seed that germinate within a few days in warm soil.You can start seeds indoors and transplant them outdoors after danger of frost if you want earlier-blooming flowers. You can grow marigolds as perennials in U.S. Department of Agriculture hardiness zones 9 through 11.arigolds are easily propagated from seed that germinate within a few days in warm soil. You can start seeds indoors and transplant them outdoors after danger of frost if you want earlier-blooming flowers. You can grow marigolds as perennials in U.S. Department of Agriculture hardiness zones 9 through 11.
Assuming that you are referring to the common hibiscus, Hibiscus rosa-sinensis, they are perennials, because they are viable year after year. Annuals are plants that grow, flower, and die in the space of one year. Of course, hibiscus are also tropical plants, so if you grow them in a northern area (where winter temps fall below freezing,) they will be killed by the cold, so you will have to get new bushes every year - thus, you might think they are annuals.