What's the difference between "regimen" and "regiment"?

Search: regimen vs. regiment

Why: In an article I'm editing:

A thorough fall lawn care regiment includes mowing, removing lawn debris, aerating, fertilizing and grub control.

Answer: As a noun, a regiment is a group of military troops (or other group of people).

A regimen a procedure or regulated system, like exercise, diet, skincare, lawn care...

Source: 171english

The More You Know: A regimen can be regimented, i.e. put into order or systematized.