Marigolds are typically a no-brainer. Is this seed you purchased? Usually all you have to do is sow, lightly cover, water, and in a few days you will have marigolds.

Yup, it was purchased seed. Guess I got bad batches.

I have always had germination rates of VERY close to 100%. I would ask for a refund or replacement. Al

i'm not so sure it is bad seed. I live in the Caribbean and have the temps required for germination but for years have never got even one to germinate. I grew some when in Africa, they germinated so easily and I just through the seed on the ground and it all seemed to come up. But here in the DR.. just cannot get one seed to germinate and must have tried hundreds.

Soak some of the marigold seeds for 3 hours. Plant.
Test germination on soak seeds.
Then take some remaining seeds and put them in a damp paper towel and store them in a frig for two days. Plant them all (germinated and not germinated).
I studied germination rates on marigolds last year and noticed that moisture helps alot.
Make sure you fertilize with a very diluted water soluble fertilizer everyday for the first 6 days after the first true leaves appear. If transplanted, fertilize with a granular 7 days after transplanting.
Good Luck

old marigold seed has very poor germination in my experience. maybe your seed was sitting around too long or got too much humidity moisture in the packet. try putting the seed trays in a warmer place, like on top of the lighting fixture, till germination. 60 degrees is a bit cool for some marigolds.