'home-grown' originates from English, specifically the words 'home' + 'grown', where 'home' comes from Old English 'hām' meaning 'home' and 'grown' is the past participle of 'grow' (Old English 'grōwan') meaning 'to grow'.

'home-grown' developed as a compound phrase ('home grown') in modern English from the combination of 'home' and the past participle 'grown' and eventually became standardly written as 'home-grown' (and alternatively as 'homegrown').

Initially, it meant 'grown at home' in the literal sense, but over time it evolved to include the broader meaning 'produced or developed locally/domestically' and a figurative sense of 'originating within an organization or country'.