How much do you need for: a big baby's breath arrangement?

These large mono-botanical arrangements can take a deceptive amount of flowers to put together...make sure you're prepared!

This arrangement was made in a plastic vase and placed in a tin container.  (The tin container was not watertight.  That's always a good thing to double check!)  I put a little newspaper in the bottom to prop up my cheap plastic vase.  I used three bunches of baby's breath total, and I also added a bunch of plumosa fern to give it a more finished off look.  The entire arrangement was bound together with a pipe cleaner, so it didn't flop everywhere and stayed together in a neat round mass.  It took about 20 minutes from start to finish.