I have more luck on single pulls it seems. Just now, reading this thread I thought 'I have hoarded 25 flowers, lets try for fun' 5 pulls and I get two 4* girls I was missing; Hibiscus, and Saffron Tulip, plus three shite pulls but I am more than happy. Early on I pulled a 5* Cymbidium on a single, and the other day i got a Dandelion 4* on a normal pull. Its not impossible, its just luck of the draw.