Just turned my 600wt to 12/12 are my plants a good size to start flowering?

hi guys I am currently running a 1.2x1.2x2 grow tent with a 600wt light, RVK 5" buddhagod carbon filter 5" and a standard intake fan at 5".... I am using 5 20lt pots and using coco and canna a+b. my plants are 3 weeks old from when I received them. I normally feed them a litre every 2 days and used 1ml each of a+b per litre also used rhizo but stopped that now. my plants aren't looking too bad considering its my first grow but I still feel they haven't as big as they could have. they are roughly around 20-24" tall but they aren't very bushy.. I am going to start using boost excel in around a week or 2 but I just wondered if anyone could look at my pics and see how they feel im getting on and if there abit small or what not as Iv been told that I should really start floweing now. any info will be helpful and appreciated guys thanks ( p.s its UK cheese from cutting)

Heck yeah..go for it !

so they look fine to u dluck?

so they look fine to you then dluck?

jordan5star said:

so they look fine to you then dluck?

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Yeah they look fine from what I can tell...Cheese is and old Skunk #1 pheno so it should have some stretch to it flower cycle.

that's fine I was just told by a friend that they aren't very bushy... but considering they've only been in there 3 weeks I thought they were doing quite well.. hopefully they do stretch and fill out and should get a decent yield cheers pal your inputs appreciated