Earth.
You derive your dew from the sea, which originates in me. If I cut off the source of the sea, how would you get your dew?
Heaven.
I have something else that you have not: should I veil my sun your flowers would fade.
Earth.
Oh, I will bring forth waters from my abyss to keep my flowers alive.
Heaven.
The lightning and the hail could destroy your flowers if I willed it so.
Earth.
I have mountains and valleys that would intercept them and shield the flowers.