Hibiscus brackenridgei can sometimes become a small tree growing up to 30 feet tall. In the garden, it is most often a 3 to 15 foot tall shrub with a diameter of 8 to 15 feet. The large flowers are 4 to 6 inches in diameter. They are yellow, generally with a maroon center, and form singly or in small clusters at the ends of the branches. The staminal column is yellow. Garnett reports that the flowers open between 2 and 4 p.m. and close between 9 a.m. and 1 p.m.
Your hibiscus will need daily watering in warm weather. But once the weather cools, your hibiscus needs far less water, and too much water can kill it. In the winter, water your hibiscus only when the soil is dry to the touch.
As a rule, a hibiscus plant needs about 6 hours of full sun per day in order to bloom to its fullest potentia
Thoroughly water the plants before and after using dry fertilizer to avoid burning the roots in dry soil
Wait two weeks and retest the planting area to ensure that the pH levels are ideal for growing hibiscus. For container-grown hibiscus, use potting soil that drains well and that's designed for acidic plants.
When pruning hibiscus plants, they should be cut about a third of the way back, leaving at least two to three nodes on the branches for new growth to emerge. These cuts should be made just above the nodes, leaving about a quarter-inch (0.5 cm.).
When you care for a hibiscus, you should remember that hibiscus flowers best in temperatures between 60-90 F. (16-32 C.) and cannot tolerate temps below 32 F.
In most cases, hibiscus is non-toxic for pets, but the Rose of Sharon (Hibiscus syriacus) is a type of hibiscus that can be harmful to your furry friend. If a dog ingests a significant amount of this hibiscus' flower, they can experience nausea, diarrhea, and vomiting. The yellow hibiscus ranges in size from a small 2- to 6-foot-tall shrub to a larger 15- to 30-foot-tall tree. The mature plant has a spread of 8 to 10 feet, notes Native Plants Hawaii. The flowers of this species of hibiscus are yellow and fragrance-free with sharp prickles around the base.
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