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.
February is the time to transplant your hibiscus to a larger pot. Use a good commercial potting mix, and gradually increase the amount of water. In March and April, place it where the temperature is between 68 F and 75 F. Water frequently and add liquid fertilizer. Leaves and buds should develop rapidly.