I just harvested my first white widow plant and have two left in flower. I started flowering mine when they were about a foot tall. I grew mine with HID lights the whole time though so they probably just didn't stretch as much as yours. It took mine 2-3 weeks to get close to a foot tall. Anyway, they more than tripled in size during flowering. They are about 5 feet tall now.
I definitely would start flowering now. With a plant that big side lighting is a must if you want a better yeild. Once mine got tall I bought an extra HPS light to put on the side of the plants and it made a huge difference. Instead of just having quality buds up on the top foot or two of the plant, I got good buds all the way down. They were much smaller farther down, but I didn't add the side light until half way through flowering.
This is just my two cents, but I would harvest early. I had four plants and one got sick so I chopped it down 2-3 weeks before it would have been at its ripest and I like the high so much more than the high I get from my other plant I harvested that was in the traditional harvesting window. The younger plant gives a good active high that lets you keep your wits about you. The older plant sends you off into your own little world and makes you tired. It also basically forces me to stuff my face with food, which isn't a good thing if I want to get out and do something that day. I am definitely going to harvest younger plants in the future. The yield isn't as good, but the high is way better.
If you want I can post some pics of my harvest off one plant or pics of my plants that are still left. They are a thing of beauty lol.
DaDuck Reviewed by DaDuck 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