John davis is great. I used A to Zinnias they too are awesome!! If you can meet with both and see who you like the best. A to Zinnias was helpful especially since I had no idea what I wanted to do for my flowers.
I also used A to Zinnias and they were SOOOO helpful and my flowers were beautiful!! They gave me lots of ideas and were pretty reasonable... I was planning from out of town and they made it very easy!