how long does it take for marigold / rice / wheat / coconut / mango plants to come flower?

Marigold, rice and wheat are annual plants hence they will flower in the same year in which the seed is sown. It takes approximately three months for them to flower after sowing the seeds.

Coconut and mango are trees hence they take a long time to flower. Mango can come to flower after 3 to 6 years of sowing the seed, depending on the variety and growth conditions. Coconut takes longer upto seven years.