Generally, it will take two weeks to see the effects of the treatment, and the effect lasts three to six months. Over time, you may require fewer treatments because weaker muscles atrophy and require fewer injections.
The hibiscus is a heavy feeder that prefers frequent but light fertilizing. A nitrogen fertilizer in the spring and a high potassium fertilizer in the summer work well for the hibiscus plant. Also, fertilizing at the beginning and during the growing season gives the hibiscus needed nutrients for growth.
Hardy and tropical hibiscus both need moist, well-drained soil. If growing in a container, plant your hibiscus in a pot with adequate drainage holes. Water your hibiscus until water drips from the holes. Never let the hibiscus sit in a tray filled with water.