1st time indoor - N Deficiency, nute lockout, light stress?

[zipperdoyle]

About 49 days old auto, in 3 gallon fabric pot, with soil. Been giving fish hyro and maxi-bloom a few times a week during flowering. The other three in there seem to be fine. This is definitely the tallest of the group so it's closest to the light. The back side (not with the most light) of the plant seems to be more green and less yellowish. I can't tell if this is N related or some other nutrient deficiency based on the picture chart. I top dressed yesterday with some Buildasoil products and trying to figure out what to do. I'm also getting some Recharge later today and may try that on the next watering. A fan leaf below the canopy is the last picture.

Thanks!

 

[BigB6]

I've seen this myself a few times and what I've discovered is it's underfed or a pH issue, considering the other plants are ok it's unlikely to be a pH issue. Sometimes when I have a big auto it just wants more. The important thing though is to use immediately available nutrients not organic especially with autoflowers. They don't have time to wait for the soil to break down.
This is just my experience.

 

[Hot Joe]

Are you measuring your ph before and checking run off once a week individually? If not, start there. Shelve the nutes until you get your ph between the recommended specs.
Usually when issues show up, they happened 2-4 weeks ago and have been going on since.
Where was that l

 

[Hot Joe]

are you dechlorinating your water?

 

[BigB6]

Are you measuring your ph before and checking run off once a week individually? If not, start there. Shelve the nutes until you get your ph between the recommended specs.
Usually when issues show up, they happened 2-4 weeks ago and have been going on since.
Where was that l

Excellent charts there

 

[FRUMPLEMEIST]

Are you measuring your ph before and checking run off once a week individually? If not, start there. Shelve the nutes until you get your ph between the recommended specs.
Usually when issues show up, they happened 2-4 weeks ago and have been going on since.
Where was that l

Yo!! Thank you for the charts. I needed this and I am glad I came across it. Take care

 

[zipperdoyle]

Are you measuring your ph before and checking run off once a week individually? If not, start there. Shelve the nutes until you get your ph between the recommended specs.
Usually when issues show up, they happened 2-4 weeks ago and have been going on since.
Where was that l

Hey thanks for responding. I never got an alert that you responded. I do PH balance to 6.5 although I don't check the PH of the runoff. I'll start checking the runoff. I also do use a boogie blue plus filter to remove the chlorination from the water.

The plant looks pretty much the same coloring wise in the leaves and did put a little bit of weight on the buds, but definitely did not swell up like the others.

Also thanks for sharing those charts as they are super helpful.