1 Gallon Pots?

I'm currently growing Sensi Star and Amnesia in 1 gallon buckets, I was just wondering if it is possible to grow plants to around 4' Feet tall in these pots? With good yields? All the way through harvest?
(Side Note: My girls are looking beautiful aren't they????) Picture #1-On the Left: Critical Sensi Star / On the Right: Amnesia

4ft in 1Gal is pushing it imo. What's your medium?

50% MG All Perp Soil- 50% MG Perlite / Bottom half soil, Top half perlite