Germination: Combine 2 parts sand, 1 part perlite and 1 part sterile compost in a bucket. Stir the components while adding water. Add water and stir until the mixture feels moderately moist and takes on a uniform appearance. Pack the sand mixture into a 2-inch-deep nursery flat. Fill it to within 1/4 inch of the top. Press the surface to make it even and squeeze out any trapped air. Lay out the aloe seeds 1 inch apart on the surface of the sand mixture. Cover the seeds with a very thin layer of sand. Place the nursery flat on a large table or workbench where it will receive eight to 10 hours of sunlight daily. Shine a fluorescent lamp onto the nursery flat for eight to 10 hours daily if sufficient natural light is unavailable. Warm the bottom of the nursery tray with a heat mat set to 70 F. Keep the heat mat turned on at all times while the seeds germinate. Drape a sheet of plastic wrap over the nursery tray to help hold in the warmth. Remove the plastic wrap for a few hours to dispel trapped moisture whenever excess condensation forms inside. Mist the aloe seeds whenever the sand mixture dries out in the top 1/2 inch. Avoid letting the sand dry out completely for longer than six to eight hours, but do not saturate it either. Look for sprouts in two to four weeks.
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