Deficiency help

Just crossed my mind, transpiration is something not mentioned. If the leaves can't transpire from poor conditions can cause those spots you have and sometimes they start to raise, pimple like. With a bad mix of too much light, high humidity or lack of, poor airflow, over or under watering will definitely cause this issues. When I grow in soil I only have to water 7-8 days during veg and every 3-4 days during flower. Feed every other water. Of course your medium used is going to affect that. I'm not a fancy person and stick to soil, hasn't failed me so why change. I see you have the probe in the soil, not a fan of those, I didn't have better luck until using a PH pen for my readings and to check my TDS. I don't top until there are minimum 4 nodes on the plant but to each their own. From what you posted in diary seems like a lot of stress to soon.

one more thing. What water are you using? Type of Water was my enemy in my first grows.

Sorry for the late response but something to think about on future grows. I don't see any signs of deficiency at this stage from what's visible in pics. Veins look ok, no yellowing or burnt tips or edges. The only possible nutrient issue may be with Phosphorous with the blueish green color. Play it safe and flush the plant and start over with minimal nutes and correct ph. I agree with Ninjabuds about over watering. let it dry out, sometimes my leaves may appear to be falling down. not curling or wilting when it's time for water.

Nitrogen would be yellowing. Pretty sure it is calmag

Way too much nitrogen and not enough calcium.

You're right to suspect nitrogen – the uniform yellowing of lower leaves and overall pale tone fits well. CalMag issues usually start as spotting or rust marks, especially on newer growth, which isn’t the case here. At this stage, a light boost in nitrogen should help, especially since you're still early in veg. Check pH to rule out lockout, and you should see recovery within a few days.

I’d say… check your ph and would say a little to Mutch of N If you check your EC what is it at ? I’d be temped to push back a little on the EC / lower strength of feed Good luck 🤩

calcium deficiency. possibly caused by ph issue. also could be when you water and the plant gets wet or in the soil. or it could be chlorine/chloramine issue. I have to boil my water before use because of chloramine. you can check your local water and whats in it online to get a better idea. The rest of the plant looks healthy

Looks like 100% over watering let the soil get really dry b4 you water each time the pot will be super light when you pick the plant up