There is a reason why Loverboy's "Working for the Weekend" song is so popular. The weekend is a time to relax. It's a mini-vacation from work. Some people choose to read a book or go to the park while others take small road trips and have movie marathons. Even though there are only two days, you can still relax in several different ways.
When you take a few minutes to care for something, it requires you to step outside yourself. It requires you to change your focus and put it onto the wellbeing of something else. The magic is that in nurturing the wellbeing of the plant, you are also nurturing your own wellbeing: positive action results in positive responses.