Tropical flowering Hibiscus
The tropical hibiscus is the number one selling flowering plant grown in southern Florida and California for gardeners across the country. Hibiscus will grow only in a climate where temperatures seldom dip down below 40 degrees, as it is not frost-hardy. The plant will not flower if temperatures routinely drop below 50 degrees, so if you want hibiscus for your home or as a potted plant on your deck, it will require special care to grow. This magical plant is well worth all the work and effort you put into it for its unique flowers. Here are a few things to know about growing hibiscus plants where you live.
In the southern or western part of the country, the hibiscus plant is a woody shrub that is evergreen and flowers all year long. So all you have to do to grow this plant where you live is copy their climate and light conditions. First of all, let me tell you about this plant because it originated in tropical Asia and it was brought to this country by gardeners, who like you, loved its flowers.
The foliage is dark green, and the leaf is shiny as long as it has enough water, but when the plants begins to dry out the shine will fade, making the foliage dull green. The leaf is oval, with large indentations or teeth on the edge of the leaf margin. The leaf will grow up to 6 inches in length, depending on sunshine, watering, and fertilization of the plant by you.
The flower resembles a flared trumpet that will grow from 3 to 8 inches in diameter, depending on the variety you choose and how it is cared for, again: sunlight, water, and fertilizer. The flower colors will range from red, orange, yellow, and pink; you may also find many new hybrids with two or more colors on the same flower and many new, semi-double, double-flowering and ruffled hybrid varieties.
The number one requirement is temperature, as the plant requires a warm location; after all it is a tropical plant. If you want lots of flowers, you will have to provide a location with temperatures that stay between 60 and 90 degrees all year. When you put the plant outside in early June and when you bring it back indoors in mid-September, expect the plant to lose leaves with the move. Even the slightest change will cause leaf drop, but the plant will quickly replace the fallen foliage.
As I said earlier, if the temperature drops below 50 degrees, the plant will stop flowering until it warms up again, so don't panic if that happens. Also expect that the flower size will decrease with cooler temperatures. In the middle of the winter, just keeping it alive is a challenge but I will help you. If you have the plant outside in a container on your deck for the summer and the forecast is for temperatures above the mid 90's, move the plant into the shade until the heat spell passes or the flower buds will drop due to the high heat.
Number two requirement is watering, as this plant requires a steady source of moisture, especially during the hot days of summer. Water the plant every day from June to September unless it rains, because the plant has a lot of foliage and flowers and they require lots of water. Never place the plant with a saucer under the pot as the soil needs to drain freely after watering. If you're away and it rains, the saucer will fill up with water quickly, forcing all the air out of the soil and root rot will quickly develop--killing the hibiscus. Always water according to the weather, less if it's cool and wet, and more if it's hot and dry.
When the temperatures cool, cut back on the watering, as the plant will require less water and-again--wet roots will cause root rot!
Number three requirement is fertilizing the plant to keep it healthy and flowering. Because most of us are busy, we will forget to fertilize this plant so I encourage you to use a time-release fertilizer like Espoma bloom fertilizer. During the summer months especially, the plant is growing fast and flowering heavily with the hot weather, so give the plant extra fertilizer every week. If the plant stays well fed, the foliage will stay deep green and the plant will flower all year long.
Number four requirement is insect control, and on hibiscus you will have two insects--aphids and red spider mites--on the new foliage and on the flower buds. Both can be easily controlled with a systemic insecticide. Always turn the plant upside down and spray under the foliage as well as on top of the leaf, as insects tend to hide under the leaf.
During the winter months, it's important to keep the plant as warm as possible at all time and ALWAYS avoid drafts. Hibiscus is a tropical plant that will do very well in a northern climate if you keep it warm--always above 60 degrees in your home. If the weather gets cold, especially at night, pull the plants away from the windows and move them to the center of the room to keep them warm. If your windows are a bit drafty, keep them back 3 feet from the glass on those cold and windy days. Keep plants away from doors that open and close often, so temperatures stay uniform and warm.
During the winter months, water as needed and keep plant moist but not wet. Poke your finger into the pot as deep as you can and feel for moisture. If it's moist, leave it alone as plants will do better indoors during the winter a bit on the dry side--but never let plants wilt. Always use warm water when watering the plant, never cold or you will chill the root system and hurt the roots, causing leaf drop.
Fertilize with time-release fertilizer when you bring the plant inside for the winter and repeat every 2 months. When the plant comes into bloom, also use a liquid food like Espoma grow fertilizer every 2 weeks; food equals flowers! The more direct sunlight the plant receives, the more it will flower.
Every week spin the plant around so the front of the plant now faces inside the room and the back faces the window. This sequel sunshine will keep all the foliage on the plant , not just the foliage on the front of the plant. Once the plant is in place do not move it from its location or you will have additional leaf drop. It should stay there until spring arrives and you're ready to put it outside again.
One more thing, repot in the spring when you put the plant outside for the summer, as the plant will grow faster and need repotting. Increase the pot size by 2 inches when you change the pot size. Always use a good potting soil--never cheap stuff--or the roots will suffer and so will the plant, giving you fewer and smaller flowers.
Oh, yes, one more thing...pruning. Prune to control the size of the plant especially when you bring it indoors for the winter. Prune 1/3 of the branches every two weeks until all the branches have been all pruned , that way you do not lose your flowers and the buds. Pruning will stimulate growth; I also prune the plant when I put it outside in the summer the same way. Enjoy!
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