Dandelions and nettles indicate “rabbits haven’t got here yet”

Poppies indicate “the CIA hasn’t sent the US Army here yet”

Clover indicates that leprechauns haven’t got here yet. Return after Saint Patrick’s day to find loose chunks of gold.

Lavender indicates that artisanal soap makers haven’t got here yet.

Heather indicates - oh, it’s gone. They’re here.