Some one came to my house at 135-05 Foch blvd to say that we suppose to have a small patch of garden in our front door how true is this?

If you are in a zoning district that requires a specific percentage of yard needs to be natural then yes. But this change was made in the last 10 years so if yours doesn't conform you would need to show proof that it was like that prior to the change. https://zr.planning.nyc.gov/article-ii/chapter-3/23-451

Yes. An 88yr old widow living alone got a $545. ECB fine PLUS a Bldg dept fine to be later determined, for not having enough vegetation in her front yard in Oct 2018.

No