1. Music Stores: Check your local music stores or online music retailers such as Sheet Music Plus, Musicnotes, or JW Pepper. They usually have a wide selection of classical piano sheet music, including the Waltz of the Flowers.
2. Online Sheet Music Libraries: There are several online platforms that offer digital sheet music, such as the International Music Score Library Project (IMSLP) or Mutopia Project. These websites provide free access to public domain sheet music, and you may be able to find the Waltz of the Flowers there.
3. Books and Collections: Look for piano collections or anthologies that include classical pieces. There are many published books that feature arrangements of popular melodies like the Waltz of the Flowers.
4. Music Publishing Websites: Visit the websites of music publishers like Alfred Music, Hal Leonard, or G. Schirmer. They offer a variety of piano sheet music, including works from Tchaikovsky's Nutcracker Suite.
Remember to check the difficulty level of the piano sheet music to ensure it matches your skill level. Some arrangements may be simplified for beginners, while others may be more advanced. Enjoy playing the beautiful Waltz of the Flowers!