Any idea what this white stuff is on the leafs and stems as my hydrangea
Mealey bugs. Wipe them off while you only have a few. If they are on the stems scrape gently with a butter knife. Soapey water can help too.
Central Norfolk UK
I think it’s Hydrangea Scale ... info and advice here
“I am not lost, for I know where I am. But however, where I am may be lost.”
Winnie the Pooh
Agree with Dovefromabove, I just spry all my Hydrangea's with soapy water.