Yellow leaves on hydrangea - Knowledgebase Question

silver spring, Ma
Avatar for mwbruce51
Question by mwbruce51
July 16, 2010
The leaves on my young hydrangeas are turning yellow and the first flowers are turning brown. Are they getting too much sun?

Answer from NGA
July 16, 2010
They may be getting too much sun but they might also be getting too much water. Hydrangeas grow best with 4 hours of morning sunshine and shade from hot afternoon sun. The flowers will age prematurely if your plant is getting too much sun. Yellowing leaves scattered throughout the plant can simply be a symptom of heat stress; yellowing leaves all over the plant usually indicates overly wet soil. When soil is saturated it can drive out oxygen and the roots can suffocate and then rot. Carefully assess the growing conditions, the soil and its drainage, and the amount of water you give your hydrangea. I think you'll be able to determine just why the leaves are turning yellow. Good luck with your hydrangea!

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