You gave her hint on marijuana. Maybe then your mom red more information about medical marijuana. Glaucoma is a really terrible thing. That changes something. There isn't any really effective medications to cure glaucoma. You can only treat it. And marijuana is as good as expensive medications. You know, people use marijuana as medication, not only to get stoned.
Kid, you could show your mother some grow guides on this website, however... If she will understand that you know what she's growing, she will probably quit it. Cause she'll be scared that you might boast your friends about it.
If your mother really have glaucoma, she has to treat it. Because untreated it could go to complete blindness. And most pharmacy products to treat glaucoma isnt really cheap. And... Marijuana is as good as those medications, maybe even better, cuz no bad side effects, not bad to health.
Do the right thing. In your place, I would just forget it, but your mother isn't mine
. Just don't even think about stealing it.