another year of enjoying the taiyo tree peony bloom ( or at least i think it’s a taiyo peony ) for less than 24 hours before a torrential rainfall pummels the blooms. it happens every year. i realize they are blooming at a time of the year that’s prone to get torrential downpours but they are such good predictors of the timing of a downpour that it makes me wonder if the plant can sense a change in the barometric pressure which triggers a bloom?