Seeds
Zinnia is a genus of plants of the tribe Heliantheae within the family Asteraceae. They are native to scrub and dry grassland in an area stretching from the Southwestern United States to South America, with a centre of diversity in Mexico.Zinnias are annuals in most areas of the country that have four seasons, including a cold winter. This means they last for one season. If you want zinnias every year, you will have to replant every spring. Zinnias are not cold tolerant, so check your last freeze date for your growing zone.