The flowers are formed by changing stitched (sc, dc, trc, back loops, etc.). The colors just supplement this.

Instructions for a pillowform are included

Yardage assumes 1 oz = 50 yards

You will need:
800 yards of dark teal blue worsted weight yarn
200 yards of yellow worsted weight yarn
200 yards of green worsted weight yarn
100 yards of light teal blue worsted weight yarn
1.25 yards of 45” wide muslin
stuffing
5 mm hook (H)
scissors
needle