Morning glory seeds can remain viable for years. I always soak my MG seeds in water overnight before planting and if they haven't swelled I nick the seed coat and soak them again. Maybe the seeds weren't viable or maybe they rotted?

Fraser. I prepare Morning Glory seeds the same as Karyn.

When seeds are planted directly in the ground, they can take up to 2-months before germinating.

A blue MG is hardy and invasive here. They pop up around June, weeks before newly sown MG seeds do.

Be patient. It they don't sprout 3-4 weeks from now, they're probably infertile.
Are seeds firm? Toni

I soak the seeds in tepid water for about half a day and then germinate them indoors in a homemade seed starter. They usually sprout in a few days. After establishment they aren't hard to keep watered, (the winters are dry here in south Florida too). I just have to cover them if we get one of those Florida cold snaps.

I just planted some Scarlett O'haras, (reddish pink). We'll see how they like FL summers. :)