According to the website I linked below, you can flower a plant using 12/12 any time after they are 5 inches tall. If that is true, then yes... it looks like you can flower one of those. You won't get much bud off it, but you apparently can flower it.

As far as why no one has answered your post... I doubt many people here flower their plants when they are as young as your's are. So perhaps no one here knows. Plus this is the outdoor forum... so we tend to let nature flower our plants, and flowering in nature normally occurs when the plants are measured in feet, not inches. So, you may want to try posting this in the "indoor growing" section and see if you get a better response.

Lastly... are you in North Carolina? If you don't want to say where you are. I understand... but I thought your screenname ("nc") might mean that. I'm in NC, perhaps we are near each other...

How To Harvest Your Marijuana Plants 6 Times A Year!
jsn9333 Reviewed by jsn9333 on . my 1st here are some pics of my first grow. Can I take one inside and put it on a 12 and 12 cycle and make it flower. I just moved and have no connections and would like some to eat "as I dont smoke" before fall. What do yall guys think of them so far? All these were planted at the same time. they are about 4 weeks old. Also on the bigger one, Can I go ahead and top it as I dont want a tall plant. I would rather have a fat bush. Also how much longer before I can determine the sex. Rating: 5