High danger hydrangea? French police hunt gang peddling 'cheaper weed' Thieves are thought to be stealing colourful plants in northern France because smoking some varietieSome gardeners prefer the spiky Hydrangea paniculata; others opt for the smoother mop-head varieties such as Hydrangea macrophylla. Others, often those with yellow as opposed to green fingers, do not much care. They just like to rip off the petals of any old hydrangea – also known as hortensia – and smoke them, police in France have claimeds can get youhydrangea highhyhydrangea drangea hhydrangea ydrangea