Picasso is a rare unusual and simply beautiful calla lily variety producing stunning bicolour flowers each summer newly formed blooms are creamy white to begin with then open up magically to reveal their deep purple hearts a real showstopperr grow singly in pots about 10 15cm diameter or all 3 in a 20cm diameter pot for best results they should be kept very warm and well watered once planted for 2 weeks to kick start their dormancy on a heater or an airing cupboard is fine then onc