What is this movie called?

Man falls asleep in his greenhouse. He is then awakened in the night to flute music. He follows the sound and finds it is coming from his favorite flower he takes a closer look and sees a faery girl. ( I think she visits him a second time before) she gives him the flute, he plays it (I think), and is transported to her world. ( from this point everything is orchestrated) After a while the sky starts to turn dark and flower in the field start withering and the faeries start to flee. Then a humongous black monster arrives and begins to eat all the faeries. The monster then eats the faery girl the man was with. The man then jumps up onto a huge rock jutting out of the ground at an angle, and gets the monsters attention. He is eaten too, but as he is swallowed he stabs the monster with the flute destroying it. He then wakes up back in his green house and rushes over to his flower......... I cannot remember if she was there or not.