Don’t waste your money.  Unless you are FULLY protected from any wind, (even a small gust) it will get destroyed.  I spent all the time and money to secure this and I bought the extra mounting kit.  I spent two days putting it together and securing it.  After one day, one day! the greenhouse was destroyed.  I spent another full day trying to repair the flimsy walls.  One day later we had 25 mile an hour winds.  Nothing major, and it was destroyed again.  Now, I get to take it all down and throw it away.  What a waste of money...