Bigger and better BUds a re a Product of TIME, POTSIZE, CONDITIONS, and as last point Nutrients TIME: a good flower takes at least 8 Weeks, some Strains need 10-12 for a nice Matured Bud . POTSIZE: Bigger POTS more ROOTS more FRUITS, COnditions like Light ( In flower is only more light more Light) And the fitting Temperatures and RH. And yes in the End the Nutrients are in the Game too. A very good AIrflow is needed too. So lets look in your grow.TIME: You are in 3rd week of flower. Looking good, give your Plants at least 5 mor Weeks to get ready. POTSZE: yes thats a good size, but you can go with bigger ones for a PHotopriod plant. LIGHT: I Think its aQuantumboard= ( or 2=?) looking good too. TEMPS and RH.. looking good to.........NUTRIENTS: well done.. you can use from next week on a P+K Booster from any company.. look for arounf 9 percent P and K for flower. just add it to your actual feeding. So conclusion will be like this: Get a booster, and 5 more Weeks to your lady and you see BIIIIG Buds