Those fuckers look big. Have they been vegging in those 5 gal for a while? At least a month? If I had to guess I'd say they have and I'd also say your roots have probably colonized that whole container. Are you growing organic or with bottle nutes?
If organic, and if you have the room, I'd transplant those fuckers in like 20 gal containers. If bottle nutes you could probably get away with flowering them in that container, but I've found root bound plants going Into flower usually dont work well for me.
Good looking plants tho man hope to see what these look like in flower
I have Thai strain in5 gallon cloth grow bags .my question is should I transplant into 7 gallon grow bag.or could I just flip them and flower them in the 5 gallon. Thay have been veging for 2 months.