Coctura in Galdin Quay asks the guys to find her some Ulwaat berries, but they are very rare. In order to get your hands on some, you’ll need to do the ‘Living off the Land’ side quest (which you can find here).

After you’ve grown your first batch of carrots, you can trade 2 of them to Tony for the berries. Give them to Coctura and you’ll receive 5000 EXP, Leiden Sweet Potato x1, Fine Cleigne Wheat x1, Ulwaat Berries x1, and 300 gil.