In many Jain families, greens are not eaten on Chaudas (Chaturdashi / the 14th lunar day) as a custom of restraint and ahimsa.

The main reasons are:

• Leafy greens are believed to contain many subtle living beings, so avoiding them reflects greater care for non-violence.
• Pulling, cutting, and harvesting greens can cause more harm to plant life and tiny organisms.
• On Chaudas, some Jains keep the day more sattvic and disciplined as a form of devotion and self-control.

This practice is a traditional observance in many Jain communities, but it is not exactly the same in every sect or family. Some follow it strictly, while others may not.

In simple words: Jains avoid greens on Chaudas to practice stronger ahimsa and spiritual discipline.