56-63 days. Disco Series French marigold seeds are an adorable, compact, and vibrant addition to grow in any home or garden. Disco Series seeds mature as tidy 8-12" dwarfed marigolds ideal for planters, window boxes, or as a charming border around the flower bed. Disco Series seeds grow one of the smallest and most unique varieties of marigold, perfect for compact or urban gardening. Disco Series marigold is hardy, easy to grow from seed, and will thrive in a variety of difficult gardens.