That's a lot of growing and stretching for 36 days?...anyways, you can start flowering ASAP with the 1000 HPS....next time, switch from fluroescents to HPS after the plants are about 10 inches tall....
Don't get the light too close at first...it's gonna be a big shock going from fluoros to HID lights.

I assume you have seen the sex pre-flowers? Those leaves look they have a LOT of Sativa strain in them. Usually White Widows are 60% Indica/40%Sativa.

Good Luck...enjoy your grow...:thumbsup:

dutch
Dutch Pimp Reviewed by Dutch Pimp on . White Widow 36 days - When should I flower? Hi... First time grower here. I posted another thread about my preflowering beastie.. but I wanted some old school pro's to have a look at my white widow girl and hopefully give me some advice. She's 36 days old. Indoor in soil. 24/7 light with flourescents. Im planning to switch to a 1000 watt hps for flowering. But Im not sure when I should start flowering. She's right at 3 feet tall in her pot, about 2 feet 3 inches from the top of the pot to her tip. When should I start flowering her in Rating: 5