Redondo Beach, Ca
|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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