Found a glitch that can dupe flowers
place flower on the floor
place block of sand / gravel / anvil on top
break the block the flower is on
get 2 flowers instead of 1
video of this in action:
https://www.youtube.com/watch?v=HrtpC694Fuk&feature=youtu.be
sorry it got cut off I don't know why but it doesn't really matter anyway.
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I got the same thing in 1.8 except there is no need for a falling block on top of it.