New Grower What’s wrong with these plants? Please help

[Redeyedtony]

Hey guys, I’m in my first grow, 29 day old plants (Amnesia Auto and Glueberry Auto) I started noticing the preflowers, but also that the lower fan leaves are getting like pale spots and browning on the edges. Please help guys.
Soil: Black gold
Nutrients: trio
Lights: 18/6
Last feeding had a ph of 6.6 runoff on both plants was 6.4. idk what I’m doing wrong any advice, criticism, etc is welcomed. Teach me Sensei!!. Pics attached.

 

[namvet25]

Start using bloom nutes along with cal/mag and see if that helps.

 

[Redeyedtony]

Start using bloom nutes along with cal/mag and see if that helps.

Thank you, For the response. I will give this a try! I ordered cal mag it should be here in the morning, I was wondering when to start the bloom nutes, this helps. I will update within the next day or so.

 

[namvet25]

Start using bloom nutes when you see pistols starting to form on flower buds.