How Deep to Plant Marigold Seeds
Marigold seeds grow like many other annuals; they need to be covered by soil but not planted too deeply. They need moist, warm soil to germinate and can be directly sowed outdoors or started inside.
- Sow marigold seeds at a depth of two or three times the seed’s size. Some seeds need direct sunlight to germinate, but marigold seeds do not. Cover them completely with soil.
- Since marigolds are not large seeds, and may be difficult to grasp, shake the seed packet to sprinkle the seeds onto the soil.
- Sow the marigold seeds after the last killing frost. Germination needs warm soil; optimal soil temperature is 60 degrees Fahrenheit or above. Start seeds indoors six to eight weeks before the last frost to get a head start.