Short answer: dhaniya (coriander) is not universally forbidden in Jainism. It is a leafy herb, and most Jains may eat coriander leaves outside special periods; during some periods (like Chaturmas or Paryushan) many Jains restrict leafy greens, and practices can vary between Digambar and Shwetambar communities.

• Outside those periods: coriander leaves are generally considered permissible.
• During Chaturmas/Paryushan: some Jains avoid all leafy greens, including coriander, while others restrict only on certain days. Practices differ by family and sect.

You can read more on how coriander is treated in Jain practice here and see a broad Jain foods guide here .