If you stop deadheading in August, you will allow some marigold flowers to finish up their life cycle by going to seed. These seeds develop, dry and drop to the ground. It's entirely possible for the seeds to last through the winter to germinate in spring.
Storing marigold seeds is best done in a paper envelope so any additional moisture can escape. Plant them in the spring and you'll have a whole new generation of marigolds. One thing to remember: when you're collecting marigold seeds, you can't necessarily depend upon getting a true copy of the parent's flowers.
Most marigolds are annuals, but a few are perennials. Marigolds self-seed so they may appear to be a perennial when in reality, they are just coming back from seed.
The most common types of marigolds for garden planting are annuals. This means that they sprout, flower and die within the same year. However, the flowers do tend to come back the following year due largely to their ability to self-seed.. . . . .364011235383!]0000000000000009783314146360!]
