You may use any yarn you like and 1- 3 mm hook size). Great possibility to use yarn leftovers. The color of the tree and flowers can be almost anything. Any yarn can be used. It depends on what product you will be making the applique for.
The tree trunk is 12 “(30.5cm) high by 8” (20cm) wide.
This crochet pattern is in English (US terms).
In the table of terms there are symbols in English, British and Russian languages.