New Grower Potential nute burn?

[Burton1]

Hey guys new indoor grower here. I have some Moby dick and ak critical mass auto flowers showing some issues any ideas?

grown in promix hp medium
Light: mars sp250 and vectorspectra 600
Nutes - flora nova grow and Sensi magic cal mag every second watering at 75% strength.

let me know your thoughts

 

[Burton1]

Added some more photos to see if that helps narrow down the issue. Also have another ak under same feeding schedule and light but started later that is pale as well. It’s the last photo.

 

[BII]

Maybe it just needs more food. Presuming that "every second watering at 75% strength" means you give no base nutes every other (50% of the) time, you are feeding at 1/2 strength of 75% or just 37.5%. That seems low.

 

[Burton1]

So the tips and color could be a indication of not enough nutrients? I’ll see if upping the nutes to every feeding makes a change.

 

[BII]

So the tips and color could be a indication of not enough nutrients? I’ll see if upping the nutes to every feeding makes a change.

The seeming general yellowness of newer growth is more what I was thinking about (but could just be the lighting) when noting it may need to be fed more, in the context you of just feeding half the time, which really means cutting your feeding in half. With your apparently mixing inert media with all-purpose organic nutrients and feeding way off coco's pH range, in soil's pH range, who knows (well beyond me) what kids of excesses, deficiencies and lock-outs you have or are developing.

 

[Garage_Grower]

Whats the ph of your feed? It looks like a ZN def, could be caused by a lockout.

 

[Burton1]

Waiting on my ph pen to arrive going into it blind at the moment! Should I do a flush and start over feeding ?

 

[Burton1]

Seems to get worse any thoughts.

 

[Burton1]

Did a flush and reading 360ppm on the first bucket drained?

 

[Garage_Grower]

You said it best, without a way to measure PH you’re just going in blind. 360 ppm is not high for runoff, so once you get your PH pen mix your feed to around 6.2-6.5.