Gardenia Bush Diseases

Gardenia plants and bushes work wonders for any type of garden and landscape design. The beautiful white blooms and fragrance can liven up any area, be it indoors or outdoors. With proper gardenia care instructions, you can maintain healthy gardenia plants, free of diseases and pests. Nevertheless, growing gardenias indoors is a bit challenging, as the plant requires abundant sunlight, high temperature and humidity. Let's take a look at how to care for gardenia bushes and the tips for identification of gardenia bush diseases.

How to Care for Your Gardenia Plant

Gardenias are native to tropical and sub tropical areas. Hence, they perform best when provided with the same growing conditions as their natural habitat. Also, timely blooming depends on availability of these requirements. Many of us are not aware of how to grow and care for gardenia bushes. Well! The most important tip for gardenia plant care is to provide correct temperature, sunlight, humidity and fertilizer.

• Temperature - Gardenia plants require warm but not hot (about 65-75 degrees Fahrenheit) temperature for proper growth and timely flowering.
• Sunlight - Plant a gardenia bush in areas that receive indirect sunlight for a prolonged duration.
• Humidity - Daily misting or soaking the container in water is ideal for providing correct range of humidity to the gardenia plants.
• Fertilizer - Feeding a gardenia bush with a slow release fertilizer should be done once every 2-3 weeks.

Identifying Gardenia Bush Diseases

When winter arrives, extra care is required for maintaining healthy gardenia plants. Avoid pruning the plants during a cold weather condition, instead you can trim the branches immediately after the blooming period. Understanding the tips for gardenia care in winter will help you in preventing the onset of diseases and pest infestation. The following is a list of the common diseases of gardenia bushes:

Yellowing of Leaves
Leaves turning yellow is not actually a pathogen related disease, but caused by excess watering of the plants and high pH levels in the soil. In order to avoid such a problem, follow gardenia watering instructions as directed by a horticulturist. If pH is the reason, supplement the soil with additives to maintain a pH range between 5.0-6.5.

Dropping of Buds
Imagine your gardenia bushes develop flowering buds and eventually, the buds drop. This dropping of buds is one of the most common problems of a gardenia bush. Similar to foliage yellowing, bud dropping is caused due to improper growing conditions. So, in order to solve this problem, check and maintain the soil and humidity levels.

Stem Canker Disease
Canker disease is the most destructive gardenia plant disease, which leads to stunted growth or at times, death of the plants. The affected stem is swollen and the plant dies slowly. There is no preventive measure for canker disease. You can prune the gardenia branches, whenever you notice any signs of disease. This will prevent spreading of the fungus to other plant parts.

Leaf Spot Disease
Leaf spot diseases in gardenia bushes are caused due to infestation by bacteria and fungi. Depending upon the causal organism, the affected leaves turn yellowish, reddish or brownish in color and ultimately, fall off. In case of heavy attacks, you can make use of pesticides, however, only under the jurisdiction of a professional pest control service, in order to control this disease.

Powdery Mildew Disease
Powdery mildew is a white, powdery fungal disease that affects nearly all parts of the gardenia bushes. This is often caused due to close plantation of the plants and very high humidity levels. Avoid water retention in the leaves and stem to prevent powdery mildew; you can prune the severely infected parts and spray with a correct concentration of fungicides.

Sooty Mold Disease
White flies indirectly cause infestation of sooty molds by leaving a honeydew substance, wherever they feed on the gardenia plants. Sooty molds then feed on this honeydew substance, making a black film over the gardenia foliage and stem. Killing the white flies and spraying the gardenias with an appropriate fungicide will help in controlling sooty molds.

With this information on how to care for a gardenia plant and gardenia bush diseases, I hope you can maintain healthy plants and identify the disease symptoms as soon as possible. Provided that the plant requirements are optimal, a disease free, matured gardenia bush will bloom to its fullest during the summer months.