Bottom leaves yellowing 3 weeks into flowering

Been watering when pot feels light. Growing in pro mix, feeding every other watering. Water with 6.2 ph. Light is a 600 watt hps. Using general hydroponics flora series and calimag. Bottom fan leaves yellowing. Thinking it could be nitrogen deficiency or letting pots get to dry

To me just looks like you need to feed a little heavier.

Whole plant looks to be a little pale.

If you’re still using grow nutes bump up the ppl a little more next feeding.

I watered today I had been running 700 ppm at feeding, was what a member had suggested. I bumped up feeds today and fee with 900ppm.

HellValley said:

I watered today I had been running 700 ppm at feeding, was what a member had suggested. I bumped up feeds today and fee with 900ppm.

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Another thing you may want to consider for next time is some form of plant training.

Personally I use a combination of a few different techniques that I’ve learned over the last 10 years.

TOPPING

MAINLINE TRAINING

LST

REMOVING GROWTH FROM UNDER THE CANOPY THAT IS BEYOND THE PENETRATION POWER OF THE LIGHT SOURCE.

These techniques along with balanced feeding and optimum environmental variables will make your good grows become great grows.

Could be short on Magnesium - I've used RAW B-vitamin as a magnesium supplement (its something like 8-9% Mag) with good results in the past.