I'm not sure about some things... Plants are only 20 days old but...

My plants are 20 days old from sprout.

They are 4 to 6 inches tall, and they have only about a half inch to an inch between nodes - very minimal stretch.

I am using Schultz Moisture Plus Potting Mix. it is less than 1% of the three nutes I see mentioned around.

I started them in little 4 ounce plastic cups, and as soon as I saw roots on the sides, I moved them to pots that are about 6 inches across and 5 inches high. At that time I mixed two tablespoons of used coffee grounds into the new soil while still in the bag, and they seemed to love it because these plants are huge and not stretchy and look really good compared to many first grows I've seen.

The bottom leaves are turning yellow. Not the starting leaves, but the next ones up, the first spiny leaves, are turning yellow, only on the larger plant, and not the smaller one. Natural?

I also am not sure about the strain - bagseed - but it seems to be showing its sex already (both female if so) because there are nodes with little pointy things sticking upward and they look like they will eventually puff up and spit out two little hairs, just looks like two thorns sticking up, one on each side of the node...

Anyway, this is 20 days in, and I have only been using 5000k 3x23w 100w equivalent so far.

The lights have been kept very close the whole time, the box they are currently in is also very small (old drawer with white canvases screwed to the sides and a lid laying over it with lights hanging through it, the front is covered by a board I gesso'd white (white painter's primer) and they go 24/0.

I am looking at them and I am thinking "these seem to already be showing sex... wtf" and "maybe I need to switch to 2700k fast and make a fully light-sealed box for dark time" etc.

I just am looking for advice - don't know what I should do next, I need to get another Y adapter to have all 4 of my bulbs running, but don't want to do that if it's better to grab that Y adapter and grab my soft white bulbs now, especially if this is indeed sex showing?

I know this isn't the most well written post, but I think the info is all here. If I need to be more specific about anything, let me know, I will be glad to provide extra details to this riddle! Thanks as always RIU! <3

I also am not sure about the strain - bagseed - but it seems to be showing its sex already (both female if so) because there are nodes with little pointy things sticking upward and they look like they will eventually puff up and spit out two little hairs, just looks like two thorns sticking up, one on each side of the node...stipules. both male and female have them. look to the outsides of those for sex gland.

pics or it did not happen

Don't have a digital camera on hand... It happened... You can google for any images of small pot plants and when you see bushy little plants with tiny space between nodes and yellow on the bottom 2 serrated leaves on one of them, there are basically mine... lol...

Where exactly to look outside of those Stipules? Or, it's too early to look anyway and they appear long before sexing?

Anything on the yellowing leaves at the bottom? I have seen plenty of threads googling before this, but they are unsatisfactory and with everything people say added up it equates to "could be anything" - I see people say it's too much water, not enough, too much nutes, not enough, too much light, not enough, natural to happen, and so on - always a contradiction, so I am looking for the post that tells me, and the posts that follow it and confirm it true or contradict it. =)

might be a rapid maturing plants id give another 2 weeks tho just to make sure

yellowing leaves at the bottom are normal those are baby leaves makin way for the lower growth during flowering you shsould trim these so the plant will use more nutes on the buds and sugar leaves

I will get some pics soon, I am shocked by these, I expected them to look like so many I've seen, especially since I'm using CFL, but they are, to my first-grow eyes, strong, thick, fast growing.

nice so what did you decide the yellowing problem was

I still don't know. I am here asking that.

i think the yellowing isnt natural for this stage, you maybe need to give more food, probebly def of nitro. as said already, probebly the sex signs you see are the stipules, but it might be feminine hair, it happend to me that they started before i moved the plants into flowering.