You can grow your own leafy green vegetables at home without leaving your house.
Take one cup dry lentils and soak in water for 24 hours. Then distribute the same lentils into three separate mason jars. Wait two weeks and you will have green sprouts you can eat everyday as part of your salad. The more lentils you sprout, the more greens you will have and you will never run out. But you must continue to sprout new lentils every two weeks, minimum. You *must* also add fresh water every single day and immediately toss the water. You need to do this until you finish consuming your sprouts completely. This way, you avoid putrefaction because the sprouts do not sit in water; they are only very wet. Below are some photos that will help explain some things that I may not be saying.
My wife and I sincerely hope that this helps at least someone out there who cannot get to a supermarket or cannot easily acquire fresh veggies for reasons of security, disability, scarcity, or lack of means.
Love and luck to all in this struggle!