This is a great plant to start from seed. Planting French marigold seeds can be done by starting them in the house before 4 to 6 weeks before winter has passed or by direct seeding once all danger of frost has passed.
If you are planting French marigold seeds indoors, they need a warm area. Seeds need a temperature of 70 to 75 degrees F. (21-23 C.) to germinate. Once the seeds are planted, it takes 7 to 14 days for the plant to pop up.