Well, This is tricky answer. The plantes are all being pulled by the gravity of the sun.
1: If there was no gravite the planets would be stationary.
2: The plantes would be floting in space on there own direction untill they hit something.
By the way. Its really not possible to not have gravity. It comes from the mass of things. So if there was no gravite i dont think anything would move.
So i would have to say false.
Hope this make someone of sence.