Well, that's just silly.

The good thing about the web?
You can get free advice.

The bad thing?
Good advice is rare.
Beware of "I heard/read somewhere that . . ."
Mo' betta?
"I actually did exactly this, and here is what I observed."

First hand knowledge, from actual growers, with good reputations, is the best way to go.

And, it's not merely the blind attempting to lead the blind.
Some is designed to cause you grief.
Google "fnord".
I guess they think it's amusing to get some newb to ruin their meds.

Take all advice offered with plenty salt.
That includes mine.
Nobody knows everything about everything, yah?
And, it's the things that you are sure you know that are simply not so, that cause the most pain.

Just cover your topsoil with a dryer sheet or two.
That will keep stray weeds from germinating and deter flyers like fungus gnats, whiteflies, and flying root aphids from starting a family.
They are cheap, non-toxic, and very effective.
Change them every 2 weeks or so.

Other than that.
The gals look a tad yellow.
Can I assume that's the lighting?

The thumbnail won't expand so it's hard to see.
Take a couple snaps in natural light and we'll have a better idea of the overall health.

Agrowha
Weeze