For this pattern I just used a bunch of mismatched balls of yarn

Pink I used Bernat Handicrafter Cotton Rose Pink (2 4oz balls)
Green I used Lion Cotton Sea Spray (2 balls 4oz)
Off White I used Lily’s Sugar’n’Cream Ecru (2 balls 4oz)

The whole pattern is crocheted with 2 strands held together throughout So while I say 2 balls of each it uses closer to one ball of each.