ok my firned has a plant that has bud that big or at least with in reason of the same size. if you have lots of nuetence and cut every other bud or so it will give more nutrence to the one bud have the plant grow on it's side so the branch does not brake
To get massive colas you need lots of roots to suck up all that water and nuites. SQ had 6-8" dia plants with huge roots in 5 gal buckets w/growrocks.Thats how you get big buds, growing hydro trees.