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.
Plant perennial hibiscus in full or part sun on well drained soil. Theyâre pretty forgiving plants, but do like a good drink during hot, dry summer weather. Amend the soil with compost annually.pace plants 2 to 3 feet apart in the garden. Growing Tips. Hardy hibiscus like moist soils, so keep plants well watered and mulched with bark mulch to prevent weeds from crowding them and maintain the soil moisture. Fertilize in spring with a layer of compost.