With their cheerful, whiskered faces and wide variety of colors, violets are some of the prettiest and earliest blooming plants in the garden. While many of the 500+ species are perennial, these rugged plants can also be treated as annual plants for early spring color. Because violets tolerate cold temperatures, theycan be the first flowering plants placed outdoors in the garden or containers (good news for gardeners with spring fever). Violets are extremely easy to start from seed, too. Once violets are in the ground, they will be happy to reseed for years to come.