Hydrangea leaves - Knowledgebase Question

Redondo Beach, Ca
Question by ClaudiaByru
June 7, 2010
My hydrangeas in the front yard are doing well. One in the back yard has leaves that are almost red while another has some black spot. Should I spray with a rose spray: Ortho rose pride systemic?

Answer from NGA
June 7, 2010


A reddish hue to the leaves can be due to cold temperatures or might indicate a need for phosphorous fertilizer. Black spots can indicate a fungal disease and you can spray it with a fungicide. If you haven't fed your hydrangea, try a bloom booster (has more phosphorous than other types of fertilizers). Hope this helps!

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