Bud grow stuck?

maybe the problem is lack of correct nutrition. I saw that in week 12 you gave them bio bizz and in week 16 you only gave them easyboost. you should use values ​​higher than what you used in week 12. or maybe the problem is the root system... I noticed that you only gave 6 weeks of vegetation and that you put it on a 12-12 cycle. in those six weeks it may not have done a good rooting and now it can't absorb those sugars and nuts properly. 🤞🙏

Assuming most things were on point - I believe this is just a weak pheno as far as genetics are concerned. It looks quite leafy and not a good producer of actual bracts/calyxes/buds. Different genetics have different sugar leaf to bud ratio.. or leaf to calyx ratio. Sometimes you’ll get winners that just stack bud like crazy and you damn near don’t have to touch em as far as trimming. Some are the opposite and are leafy as ever It is indeed too late to bulk up at this point. I’d chop it personally. Looks ready as it’ll ever be. Can always extract or do ice water hash if it’s not the best smoke as far as flower

Probably not at this point.... but next grow, pick up some PK booster of some sort and start giving it to your ladies in about the 3rd week of flowering. The additional potassium and phosphorus is what will increase the bud size and density. You could certainly try that now but I don't know how long you have til harvest? She's looking like she's getting ready for the chop! Good luck my friend...