Fill a 6-inch pot with equal amounts of perlite and sphagnum peat.
Spread an even layer of agave seeds over the soil mixture.
Sprinkle perlite over the seeds and lightly cover, without burying the seeds too deeply.
Fill a plastic tub with water. Add enough water so that when you set the pot in the tub, the bottom half of the pot is submerged.
Leave the pot in the tub of water until the soil is moist.
Cover the pot with plastic wrap to retain moisture during the germination period. Remove the pot from the tub and place the pot outdoors in a bright warm location. Do not place the container in direct sunlight. It takes about two weeks for the seeds to germinate.
Lift the edges of the plastic wrap after the seeds begin to germinate to allow air into the pot. Remove and discard the wrap about four days later.
Maintain light moisture in the soil; do not let the soil dry out completely, yet do not soak.
Transplant each agave seedling into its own 2 1/4-inch pots after the plants have two or three leaves.