I had to cycle the hard way, but from what I understand, depending on the quality and quantity of your seeding material, it is possible to almost immediately cycle it. Maybe more realistically you might expect a few days to a week. Couldn't hurt to add some crushed fish food for nutrients and check the water parameters regularly. Since you are seeding, I guess you should hold off on any water changes until the bacteria have a chance to attach to surfaces within the aquarium. Maybe someone else has some insight into that.