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.
Soil and Fertilizing. Plant your hibiscus in fertile soil. If planting a hibiscus outdoors, amend the soil with peat moss and perlite or vermiculite. If planting your hibiscus in a pot, plant it in a mixture of peat moss, perlite or vermiculite and a balanced potting soil that has been formulated for container plants.