Symptoms of black spots include black and brown spots on leaves. 1- Leaf spotsįungal leaf spots (AKA black spots) are ugly spots appearing on the upper surface of leaves of ornamentals and shade trees however, they do not harm the plant most of the time.īlack spot is a fungus that often attacks hibiscus plants when you leave them in wet conditions. Propagation Vegetative cuttings or seeds 5 Hibiscus Plant Diseases To Look Out For! – 5 Hibiscus Plant Diseases To Look Out For!īelow are the 5 Hibiscus plant diseases you need to look out for. Maintenance requirements Overwatering or overfertilizing can increase the possibility of many hibiscus plant diseases. Fertilizer Hibiscus plants are heavy feeders and need a balanced fertilizer, including 10-10-10 or 20-20-20. – And ensure you keep the soil moderately moist, not too saturated. Watering Requirements – Water your hibiscus plants from the top of the soil down so that water runs out the bottom holes. Soil Type A rich and well-drained soil mix is perfect for growing hibiscus. – Perennial hibiscus blooms in mid to late summer. – Burgundy Blooming Seasons – Hibiscus flowers are beautiful however, they are short-lived, generally in bloom for only one day. Height A height of 4.5 meters (15 feet) rarely exceeds 2 meters (6.5 feet). – The hibiscus plants do not tolerate cold temperatures they need warm temperatures for flowers to thrive. Temperature – Ideal is between 65° to 75☏ – Tropical hibiscus (Hibiscus rosa-Sinensis) is an evergreen blooming essentially year-round and grows in zones 9 and 10. Genus name Hibiscus Plant family Malvaceae Sun exposure Full sun Plant type Trees, shrubs, perennials, and annuals Hardiness USDA Zones – Hardy perennial hibiscus dies down in cold temperatures, including red hibiscus (Hibiscus coccineus) will grow well in zones 5 to 9. Here is a snapshot of the main characteristics of hibiscus plants.
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