Hibiscus seeds are easy to grow as long as you provide them with the proper conditions. They require a moist, humid environment in which to sprout and plenty of humus in which to stretch their roots. Providing these conditions for your hibiscus seeds can be easier than you might think.
Plant in spring or early summer. Prepare the soil by digging down at least 8 inches and loosen the soil. Add approximately 50 percent humus into your loosened soil and mix well.
Cut a 2-liter soda bottle in half length-wise so that you have two half-bottles. Use your utility knife or X-acto knife but be very careful when cutting as it is easy for the knife to slip on the plastic sides of the bottle.
Lay three hibiscus seeds on your prepared planting bed evenly spaced so that they fit nicely under one half of your soda bottle. Cover your hibiscus seeds with shredded tissue that has been dampened.
Lay half of your soda bottle on top of your seeds, cut-side-down so that the bottle forms a small greenhouse. Plant three additional seeds in the same manner and use the other half of your soda bottle as a second greenhouse.
Shove your 2X2 piece of wood into the ground to form a sunscreen. You want your hibiscus seeds to get plenty of indirect sunlight, but use your board to block any direct sunlight from hitting your greenhouse.
Watch for seeds to germinate as quickly as three to five days. Leave your greenhouse over your plants for an additional two days. Remove the greenhouse and sun-blocking board and allow your new hibiscus to receive direct sun. Keep your plants watered, but do not saturate the ground.