No marigold seeds are growing into plants

The domain investor had purchased a large number of marigold seeds from Nurserylive in the last one year.
She has tried very hard to make the marigold plants grow
However, despite her best efforts using a large number of pots with different soils, she is not able to make a single plant grow
Even last year, plenty of marigold plants were growing in the wild, now no plants are growing