Why does your Hibiscus rosa sinensis Cheerleader Dutch Orange have brown leaf tips? Diagnose the cause and fix it with our step-by-step guide.
Excessive accumulation of mineral salts from tap water or over-fertilization causes osmotic stress, pulling moisture out of the leaf margins. This is particularly common in 'Cheerleader' cultivars which are sensitive to high salinity levels.
Hibiscus 'Cheerleader' requires consistent moisture to maintain its high metabolic rate; if the growing medium dries out completely, the plant sacrifices the leaf tips to conserve water. Rapid fluctuations between bone-dry and saturated soil can also cause this tissue death.
As a tropical species, this cultivar thrives in high humidity; dry indoor air or air conditioning can lead to rapid transpiration that the roots cannot keep up with. This results in the desiccation of the most distal parts of the leaf.
While brown tips are often associated with dryness, overwatering leads to oxygen depletion in the rhizosphere. This damages root hairs, preventing the plant from transporting water effectively to the leaf extremities.
Your plant might also be experiencing one of these issues: