Possible Clues:

• Herb could make daughter poorly
• Daughter poorly? Medicinal herb's brought
• Daughter getting sick on herb
• Pickle flavorer
• Herb often used in tzatziki
• Salmon garnish, often
• Herb that is often used to season poached salmon
• Tzatziki sauce ingredient
• Plant of the celery family; leaf is a herb, seeds a spice
• Herb used in Scandinavian and eastern European cuisine