Hey how are these looking

Hey Folks how are these looking?

a few have just gone into their 3rd week of flowering and the others have just gone into flowering
Its my first grow also

they look good but a bit short to be flowering.
i let my reachg 4' before flowering.
ps the taller, the more buds.

look alright for a first grow. I would say its more the larger the plant the larger the harvest will be per plant. that doesnt mean thats the best way, you can do many smaller plants in the same area and get a similar harvest overall. i think those plants should fill in the full area fine. really i think its more of a personal choice on which you prefer.

They look great, but i would have let them grow a little bigger before flowering. Some of them have already produced bud. Plants will probably not stretch much, so you would probably have made more bud if you let them become bigger first.

i followed the schedule for feeding ?

Yes - and they look healthy enough ;O) - no deffieciencies as far as i can see.

i just measured and the 3 tallest that went into flowering 3 weeks ago was 38cm tall

They look really healthy and great for your first grow. The general rule of thumb is to let the plants get to at least 12" before flowering or 3-4 weeks of vegetation. But as darkdestruction420 said, it's really a matter of personal choice. You can let the plants get bigger in veg for a bigger harvest or grow many small plants and wind up with about the same harvest.

I would say you are right on track, my friend. Nice job.

ah k cool will they grow and stretch in flowering if i keep raising the light?
also if i leave them longer then 12 weeks what would happen

What kind of light are you using? I think you are using an HPS judging from the pics, and probably a 600w light. You should keep that light about 20"-24" from the canopy at all times, unless you use a light diffuser. Then you can get the lights closer.

What you want to do when getting ready for harvest is to look at the plants trichomes to judge when they are ready for harvest. When 50% of the trichs are cloudy, then you can harvest. If you go longer than that you will get a different high from the plants, which is usually couch-lock. When you harvest is really what kind of high you are looking for, an up high vs. a couch-lock high.

yes, look, healthy

trichomes are important but caylx swelling and how filled in the buds are are also important factors in determining harvest time.