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 hibiscus prefer full sun or partial shade and any soil that is not too dry. Hardy hibiscus are especially useful in areas where the soil is too wet for other perennials. In the landscape, they are often used as colorful, flowering specimen plants, as borders or as taller components of perennial gardens.