What’s a joke about flowers?

Apparently, he's really excited about the concrete.

BLOODY HELL! Peter Murphy

True story mate: an old sheila once told me to keep an eye out for dandelion flowers while I'm walking around. She reckoned that if the grass is cut, the dandelion plants are short and squat, but in other spots they can grow pretty tall. Clever little buggers, eh? Lillian Hall