How marigold seedlings are raised in nursery?

Nursery beds are prepared by digging up to a depth of 30cm and the beds are properly cleaned, leveled and the soil is enriched by applying well rotten FYM. To protect the Marigold seeds from the infestation of ants, BHC powder is dusted on the raised beds. Approximately, 3kg of seeds is sufficient to plant the one-hectare area. Marigold seeds are sown thinly and are covered with light soil. The beds are then watered with fine rose water can to avoid the displacement of seeds.