How do I determine a female sex plant from a male?

Can someone please tell me what these nodes are next to the leave growth? Also... our plants (5 in total, sex unknown as yet) are about 20cm tall. When can we switch to flower? Thanks!!!
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This is 2 pics of the same plant day 6 flower. I suspect its a Male, but before I throw it in the compost bin, Id like confirmation.

1851278
1851279
 
This is 2 pics of the same plant day 6 flower. I suspect its a Male, but before I throw it in the compost bin, Id like confirmation.


Give it awhile longer as I don't see anything that says one way or the other. Some take 10 days to show, and the longer they take the better odds a lady, as "typically" the males will show first.
 
Be gentle with me....Im fragile right now.

Different plant than the one previously posted. Flower Day 7
 

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This is 2 pics of the same plant day 6 flower. I suspect its a Male, but before I throw it in the compost bin, Id like confirmation.

20190720_080954.jpg
20190719_175427.jpg
This is 2 pics of the same plant day 6 flower. I suspect its a Male, but before I throw it in the compost bin, Id like confirmation.

1851278
1851279
Could it be just another node forming, small minute fans popping out. Notice you only have a single fan at that juncture and nothing else. Give it a bit more time. There are some awesome growers with knowledge on this site.
If you just started growing, remember there is motivation in independence.
Nice healthy looking plant
 
I ended up killing that plant by drastically trying to bring the ph down with too much vinegar. It died and this other one was its seedling kinder. Facepalm...this has set me back terribly....again!
 
I am also struggling to ID plants 2 weeks into a 12-12 light cycle. Have folks with claimed experience giving contradictory opinions. Would appreciate a solid answer. Have attached today's results which look near identical to the previous post.
P1010070.JPG
P1010069.JPG
 
I am also struggling to ID plants 2 weeks into a 12-12 light cycle. Have folks with claimed experience giving contradictory opinions. Would appreciate a solid answer. Have attached today's results which look near identical to the previous post.
P1010070.JPG
P1010069.JPG
That's a boy
 
Thank you for responding. My confusion was, having read various text books examples of male plants showed a single pollen sack at the crotch of a branch. Mine are in clusters in random locations. This is certainly not without its pitfalls.
 
Preflowers, as opposed to full blown flowers, generally appear after the fourth week of vegetative growth from seed. Check carefully above the fourth node. Please note that preflowers are very small and impossible to differentiate without magnification. A photographer's 10x loupe is handy indeed when examining preflowers.

As the images below demonstrate, the female preflower is pear shaped and produces a pair of pistils. Frequently, the female preflowers do not show pistils until well after the preflowers have emerged. Thus, don't yank a plant because it has no pistils.Pistillate preflowers are located at the node between the stipule and emerging branch.
crzycom1.jpeg



The male preflower and flower may be described as a "ball on a stick." Frequently, a male plant will develop mature staminate flowers after prolonged periods of vegetative growth. These appear in clusters around the nodes.

The following image shows a male plant in early flowering. Staminate flowers are located at the node between
the stipule and emerging branch. Note the clusters of flowers.

Author: MisterIto
Great description
 
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