its true maggi no where eles it is popular so i can see your point and the 4 years it takes
hi cohan nearly most types of plants can be grown indoors what you will need is a good setup
if u find out the photo period of the plants this is how it can be worked im sure a coffee plant is 14 hour lights off during flowering but check as i may be wrong
if your doing this with natural sun then photo period will happen alone i would go with the grow setup as with light this can mean
mass production of a plant
better supervision
and i may be wrong but im sure u can flower it yourself but changing the lights time for on and off