Coffea Arabica is easy to grow indoors, makes a very attractive houseplant and if it likes you well enough, it will even rewards you with flowers and berries!
Grow your own Coffee, will take approx 4 years for first harvest. It is actually very easy to grow, indoors. This is surely worth a try for something different.
In summer, Armatocereus Godingianus blooms at night with beautiful white flowers. Its 6-13 long fruits are green and oblong covered with yellow spines and its seeds are large and black.