pre flowers

I didnt switch to 12/12 yet im still at 18/6 and one of my plants has female pre flowers... is this normal? Has she started to flower with 18/6?

Yes. four weeks into vegetative is normal for pre flowers.

where do the pre-flowers appear exactly? im about four weeks in as well.

right at the nodes two little white hairs and or some balls will pop up.

which nodes are the best ones to look at?

I would look at them all. 4 weeks you might not have anything. I am at 5 weeks and a few days and only one of my plants has them and only on 3 of her like 8 or 9 nodes

sometimes pre flowers don't appear until well into flowering - depends on a lot of factors - including genetics.

Yeah but as for the original questions, your A ok. Gives you a headstart on sexing <3

When you going to flower?

Im waiting on an HPS light and cloning gel to take some clones and to start flowering. They should be here any day now. I really wanted to push vegging as long as possible to get the biggest yield. In one of rosemans grows he got like 15 ounces from three plants and he vegged for something like 7 weeks. I am thinking i might have to train these girls in some way shape or form as they are getting very big.