San Pedro cacti (Echinopsis pachanoi) usually bloom just once a year and only when they're mature and thriving. A few San Pedro bloom facts: Most don't bloom until they're at Key Largo Tree Cactus Is First Florida Species to Become Locally Extinct Due to Climate Change EcoWatch The Largest Cactus Garden in Europe Is a Staggering Work of Living Architecture Moss and Fog Plant Monitor Opuntia cacanapa Ellisiana Ellisiana Spineless prickly pear Wichtiges Urteil zu Hecken: Das sagt der Bundesgerichtshof zur Hhe