The hardy hibiscus is a beautiful plant with large, glossy, serrated green leaves on tall, slender stems and some of the largest flowers of any perennial. Some varieties produce flowers up to 12 inches in diameter. Colors include pure white, bright yellows and oranges, pinks and deep reds. The plant grows well in the southern United States from hardiness zones 5 through 10 and can be propagated easily from seeds.
Planting Your Hibiscus Seeds
Select seeds that will grow in your hardiness zone, soil and climatic conditions. Hibiscus seeds can be purchased from seed companies or collected from pods on parent plants.
Cut the disposable cups down to about 3 inches and punch holes in the bottom for drainage. Place fine potting soil into each cup.
Nick the tip of each seed with a knife to remove a little of the seed coat. This will improve the seed's ability to take in water. It is also a good way to identify viable seeds. Look for the white endosperm within each seed.
Plant the seeds by making a hole in the soil about 1 inch deep. Place one seed in each cup and cover with potting soil.
Water the seeds lightly and place each cup in a medium sized, zip-type plastic bag. This will help keep the seeds moist.
Place the containers in the sun to encourage the seeds to germinate. Watch for growth within the next two to three weeks. Mist with water to keep the soil damp but not wet.
Remove the plastic bags after the seeds have sprouted. Continue to water regularly.
Transplant seedlings once the plants have grown several inches. Plant them in a larger pot or in fertile prepared soil in your garden.
Fertilize your hibiscus plants and water regularly to encourage them to grow and bloom.