Why does your Rhododendron indicum have brown leaf tips? Diagnose the cause and fix it with our step-by-step guide.
Azaleas are highly sensitive to salts in tap water or excess fertilizer. High salt concentrations draw moisture out of the leaf edges, causing them to desiccate and turn brown.
Rhododendrons require consistently moist, acidic soil. If the growing medium dries out completely between waterings, the plant cannot transport enough water to the furthest extremities of the leaves.
While drought causes dry tips, overwatering leads to fungal pathogens like Phytophthora that damage the root system. This prevents the plant from replacing water lost through transpiration, resulting in necrotic leaf edges.
In very dry indoor environments or during hot summer winds, the rate of water loss from the leaf edges exceeds the root's ability to supply it, leading to marginal necrosis.
Your plant might also be experiencing one of these issues:
English
Italiano
