Why does your Hydrangea aspera have brown leaf tips? Diagnose the cause and fix it with our step-by-step guide.
Hydrangea aspera is native to moist, temperate forest understories; dry air causes rapid transpiration from leaf edges that the roots cannot replenish fast enough. This leads to marginal necrosis (browning) of the larger, rough leaves.
This species requires consistently moist soil; letting the root ball dry out completely before watering causes hydraulic failure at the leaf margins. The lack of water's physical tension causes cells in the tips to collapse and die.
Excessive mineral salts from fertilizers can accumulate in the leaf tissue, specifically at the furthest extremities like the tips. As water evaporates, these salts reach toxic concentrations that chemically burn the plant tissue.
While brown tips often suggest drought, overwatering can lead to root decay, which physically prevents the plant from transporting water to the leaf extremities. This creates a paradoxical symptom where the plant dies of thirst despite wet soil.
Your plant might also be experiencing one of these issues:
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