Why does your Rhododendron impeditum have brown leaf tips? Diagnose the cause and fix it with our step-by-step guide.
Rhododendrons are sensitive to high concentrations of salts in soil. Excess fertilizer buildup leads to osmotic stress, causing moisture to be pulled out of the leaf margins, resulting in crisp brown tips.
As a dwarf cultivar, R. impeditum has a shallow root system that is highly susceptible to drying out. When the substrate dries completely, the plant cannot transport enough water to the leaf extremities.
Dwarf rhododendums prefer consistent moisture in the air. In low-humidity environments or near heat sources, transpiration exceeds water uptake, leading to necrotic leaf edges.
While brown tips often suggest drought, if the soil remains waterlogged, root decay prevents the plant from absorbing water. This paradoxically causes the leaves to look scorched or dried out.
Your plant might also be experiencing one of these issues:
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