Wow, that's almost the entire recipe! I've never had that beer, but being a saison and having the floral ingredients, I think it is safe to guess there is just one hop addition for bittering up to the 15 IBUs. And probably any clean bittering hop would work.
Then, after putting the rest of the ingredients into a calculator, you can take a good guess at how much roasted wheat to add in order to match the color of the beer.
And like what was already mentioned, the challenge for this one would be in the yeast and fermentation.
It's awesome to see a brewery give out so much detail, though.