Pot Marigolds, with their bright yellow to deep orange flowers, light up the garden from early summer into fall, under the right conditions. Although perennial, they are commonly treated as  annuals, particularly in colder regions where their winter survival is poor and in hot summer locations where they also do not survive. Happily, they often reseed. Despite the similarity in names, this is not the same plant as the Common Marigold, which is in the species Tagetes. Pot Marigolds are related to daisies and the family resemblance shows.