Elizeabth Bishop and Theodore Roethke

As I read about these two authors, they both had amazing poems that I had to narrow it down,  I chose the poem" Big Wind " , as I read this poem it was really touching as it started off you would of thought it was talking about a greenhouse a place where you grow flowers.  Or maybe it was a Stem boat, or it even could have been a train as well.  But with the wind high it pushes the boat down the waters.  this boat was hitting the waves, so  hard it sounded like cracked glass.  The boiler was steaming up just as a pot soup cooking on the stove. If this boat was really a green house the flowers would have really grown  to  the top. The waves was so strong and high that it just pushed this boat down stream.  As it moved it started calming down in the middle of the night to the wee hours of the morning. The sail was flying high as well. Could this be a greenhouse to grow flowers or is this anhouse that was blown away in a storm?