Tropical Hibiscus are one of the most beautiful plants we can grow for summer. But did you know that these tropical plants can be over-wintered easily indoors? Just follow our hints and tips for blooms each and every year!
The first tip is to remember that a tropical Hibiscus is TROPICAL. They will not tolerate more than 1-2 nights of light freezes. Even one hard freeze (below 25°) can kill the plant. They are native to sunny, warn and usually humid tropical places. They detest cold, rainy weather and cold, wet soil.
Container-Grown Plants
Use a loose potting mix and do not let water stand in the saucer. Frequent use
of water soluble fertilizer and light use of granular fertilizer (Osmocote) is best. When potting up, prune both the plant and the roots to promote new, balanced growth. If placed indoors, mist or use a humidifier and place in a sunny location.
Getting Ready for Winter & Over-wintering
Here in Ohio, your Hibiscus plants will need to be brought inside for the winter. Spray with an insecticide before bringing the plant into the house to control bugs. When fall approaches and night temperatures start to drop below 55°, it is a good idea to bring them indoors BEFORE temps regularly drop below 40-45° F at night to avoid any damage. Place plants in a non-drafty southern facing window or in the basement under grow lights. You may experience yellowing and dropping leaves, but don’t worry, that is normal.
The Next Spring
Prepare your tropical Hibiscus by pruning them before you bring them back outdoors for the summer growing season. You should expect blooms on the new growth in about 3 months. Use sharp pruning shears and cut just above (1/4 inch) an eye that is pointing in the direction you want the new growth to go. At this time you can also start fertilizing and gradually bring your plant outdoors in the sun. But, if night temperatures fall below 55° be sure to bring them indoors.
Common Problems: