Stick with the French Marigolds. They are always easy to grow and germinate. To many of the hybrids are crossed so many times that they are not dependable. Let the flower heads dry completely until brown. Also separate the seeds from the flower head and let them dry completely too before storing them. I grow French Marigold especially when planting tomato seedlings. They are great to deter and kill root knot nematodes. Just plant the roots and greenery of the Marigolds around your seedlings when u transplant your tomatoes. Only use French Marigold varieties.
