what do you think about my Trees poem?

please let me know what you think about my poem. I started writing it in reply to a thread about trees on a forum and then just decided to make it into a long poem

Standing like sentinels seeking to sustain us with their presence

They ask not for our assistance or that of our repentance

In their permanent stance of exaltation

Their branches reach for the sky

their growth knows no limitation

and only their best friend God knows why

New leaves conceived

They hold on tight so green and bright

in Spring and Summer

but then comes the bummer

The leaves fall in Autumn

The ground stood there and caught em

they just let go or did the tree really throw

them into the wind to be carried away

say I'm sorry but you can't stay

You are a part of me and I loved you

but now it's time for you to shoo

return to the Earth

One that gave you birth

I need you no longer

for now I'll be stronger

I've set you free like you've done to me

a lesson learned from Saturn

if you look for the pattern

You'll see that they both have rings

and now it's time for new beginnings