Often called princess lilies peruvian or inca lilies alstromerias stunning displays make it one of the most popular summer flowering perennials of all time often seen in expensive bouquets alstroemeria also make spectacular additions to any garden their gorgeous delicate blooms come in one of the widest and brightest ranges of colours imaginable flowering from early june onwards alstroemeria will go on right through until early autumn and just get better and better every year once