Fill a large flowerpot with potting soil. Water thoroughly, allowing the water to run out of the bottom. Mound up the soil in the center of the pot.
Plant a seed in the center of the mound, covering with 1 inch of soil or vermiculite.
Add 2 inches of mulch, covering all the soil except the top of the mound. Don't cover the seeds with mulch because it discourages seed germination.
Place the flowerpot in a warm, brightly lit location. Luna hibiscus seeds germinate within a week when the temperature is 68 to 78 degrees Fahrenheit.
Water regularly, keeping the soil evenly moist. Don't allow the hibiscus to dry out.
Fertilize with a 10-4-12 fertilizer formulated for hibiscus. Follow the manufacturer's instructions for application rates and amounts.
Move the flowerpot into full sun after the hibiscus is fully established. Hibiscus planted in shady locations may not flower.