Now I'm wondering in which orientation a rocket lauch would fly.
Lauch is CC-BY-SA 4.0 by MScharwies
https://commons.wikimedia.org/wiki/File:Porree.svg
@ripper leaves down might look correct, but consider the number of adaptations needed.
For one there would have to be a method of orienting itself upside down.
But also the structure of the nested cylinders breaks open at the top, whereas at the bottom they are nicely nested, which probably works a lot better for a solid fuel rocket!
It's not like those floppy leaves will nicely cradle the flame, there too, the roots are more suitable for this adaptation.