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.
STORE HOME TERMS & CONDITIONS VIEW CART CHECKOUT. Charles Black has mixed his own hibiscus fertilizer for years, searching for the best performing formula. Our HVH Special-Blend Fertilizer is the fruit of that experience, available to all gardeners in convenient amounts.