Ageratina altissima (Eupatorium rugosum) This is this year's exploding plant

Every year or so it seem like one plant explodes from whatever reasonable sized niche it normally filled, moving around into new spaces and multiplying 10-fold in the sites it's always occupied. Last year it was Oenothera biennis, the common evening-primrose. Before that I remember Joan's bidens, Bidens aristosa. Who knows what'll pop up next year. I love these explosions because they force me to acknowledge how little I know about how things work. Maybe it was the rain last year, maybe something the year before or the year before this. It keeps me humble and gives me something to look forward to at the same time!