This account is for my mother (the 60+ in the profile) who is an avid gardener (though her health problems mean I have to do a lot of the “heavy lifting” for her).

Living in Canada limits her options somewhat (as does the small place with small backyard she now lives in), but she nevertheless grows a plethora of flowers (including 6' tall lilies of numerous colors), vegetables (her record was a harvest of about 15 different kinds in the old house), and herbs (again her record is about 10 different kinds).

My favorite documentary on plants (and indeed on anything) is the incredible BBC mini-series How to Grow a Planet.