Annual flowers grow, bloom, seed and die in one season. Usually the first frost will be the beginning of the end for annuals. Annuals often require a bit more care, such as consistent deadheading, daily waterings and routine fertilization. However, annuals offer a bright, colorful accent to your garden and are enjoyed throughout the spring and summer. For those who love tending to their garden, annuals are a great choice and worth the extra effort. You may also find annuals returning the next season under the right conditions, which makes for a lovely surprise!