Any help...much appreciated

Bear with me all, I'm a third year grower. My garden consists of 32 plants, grown in a hoop house with some added LED lights to help out. Half of them have been in flower about three weeks now, the other half just getting started with flowering. Here's the issue:
The older group has begun to yellow, on the older leaves. It started from the bottom and has continued. The leaves eventually yellow, curl up and die. I'll show some pics illustrating just that. This my sound crazy but I know this plant, it seems the overall health is declining. I have noticed some aphids showing up and treating as best as possible as I don't want to damage new flowers. I don't know what to do....

Are the leaves that are dying shaded like that all the time? If so it's just the plant conserving resources.
I use insecticidal soap for aphids and mites, but I heard a rumor it's bad for trichomes. I haven't experienced this, but someone else may have.

What are you using for nutes ? And light might not be penetrating down to those leaves that are yellowing

CanadianJim said:

Are the leaves that are dying shaded like that all the time? If so it's just the plant conserving resources.
I use insecticidal soap for aphids and mites, but I heard a rumor it's bad for trichomes. I haven't experienced this, but someone else may have.

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The yellowing began about ten days ago. It looks like the veins remain green and the rest yellow out. It seems like it's slowing the flowering growth.
I am seeing a good amount of aphids actually, I'm not sure the long term effects.

heaze2010 said:

What are you using for nutes ? And light might not be penetrating down to those leaves that are yellowing

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I'm using the fox farms trio plus Bembe and Cha-ching. Fed them this morning.
They seem to be getting plenty of light however it has started at the bottom and has made it's way almost to the colas.

Stephanie Dahlquist said:

I'm using the fox farms trio plus Bembe and Cha-ching. Fed them this morning.
They seem to be getting plenty of light however it has started at the bottom and has made it's way almost to the colas.

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Perfect thread for you, it explains it 3 replies down
https://www.rollitup.org/t/fox-farms-cha-ching.930584/

heaze2010 said:

Perfect thread for you, it explains it 3 replies down
https://www.rollitup.org/t/fox-farms-cha-ching.930584/

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Very helpful, thank you indeed. Sometimes I forget that it all starts with the pH.