Day 35 of flowering...

[Weed4Life]

I probably would start to flower those now, but it all depends on how much room you have vertically. The longer you veg them the bigger they will be and the more buds you will get.
You will see signs of sexing in about 1week to two depending. If you notice these balls(clusters) or banana shape things, it is a male and get rid of them! No bud will be produced from a male just pollen sacks.
How old are they? you can throw plants into flowering after like 4 weeks, but you will not get as much growing in soil. Hydro, is awhole other thing which I am reading up on daily. So much but will be worth every word read and dollar spent.

[Weed4Life]

Day 39 and not too much progress except I have raised my soils ph to about 5.0+ and I will water next in about 3-4 days and I will feed with a mild nute solution and a slightly higher PH to raise a bit more. I have also added an additional 150w hps and 2 100w cfl's to help bulk up the lower branches.
Here is pics at day 39:

[Bud-Wiser]

thanks Guys. i got another 4 foot...so will probably leave it a little longer. i am in uk and when i look at many other growers pics the plants seem much more bushy and fuller than mine do ?...Mine are White Widow and Bubblicious..not sure if its a climate thing or what ?!?! - I would love to do hydroponics as soil is messy indoors too its just i havent designed a good closet setup yet for it...what with pipes and drains and stuff..maybe nex time or the one after. when i repotted these from 2ltr to 4 ltr pots last week they were root-bound and tehy are not even that big..i guess with hydro that wouldnt be an issue. Also CO2 enrichment..the cheapest safest way ...so many things ...dusto! - I like your grow..looks nice. I am going to clone next time...growing from seed was a lonnnnng haul...Can you kep a female separate and on vegging like (for months) and use for cuttings or will she eventually die ? - I need to do this but i will ned a seprate box or something

[Drugs.not.Hugs]

Dont forget to leave a couple feet of height for your hps. Unless your gonna do some training, I would throw them into flower now:thumbsup: