Why does your Rhododendron Aberconwayi have brown leaf tips? Diagnose the cause and fix it with our step-by-step guide.
Rhododendrons have shallow, fibrous root systems that are highly sensitive to drying out. When the soil substrate dries too much, the plant cannot transport water to the furthest leaf extremities, leading to desiccation of the tips.
Excessive application of mineral salts from fertilizers can accumulate in the soil, creating osmotic pressure that prevents water uptake. This specifically manifests as scorched-looking brown margins on the leaf edges.
As an acid-loving plant often grown in temperate/moist environments, Aberconwayi is sensitive to low ambient humidity. Rapid transpiration from the leaf edges occurs faster than the roots can replenish moisture during dry spells.
While tip burn is often associated with dryness, overly compacted or waterlogged soil can cause root decay. This prevents the plant from absorbing any water, resulting in symptoms that look identical to drought stress.
Your plant might also be experiencing one of these issues:
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