wow thats only 4 weeks? I've just harvested this strain a week ago. yours is looking much much bigger than mine at 4 weeks im sure, the stem looks thicker than mine after 4 months lol. you could def flip o flower if you want. barneys farm? I flowered mine for 74 days and feel could have easily went a few more weeks, despite breeder saying 55 - 60 days.

looking good man good luck