Indoor Fan leaves yellowing

[karlkutta]

Hey guys, this is a repost of a thread I posted previously but I think it got lost in the server migration. Also, it didn't get any responses.

I'm posting it again to hopefully get some insights. It may not help me on this grow but maybe a future one....

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-Problem: fan leaves yellowing

-Medium/grow method: soil; foxfarm ocean forest

-Feed and supplements used: advanced nutrients sensi bloom A/B 10-12ml per gallon. Plus 4ml foxfarm calmag.

-Water source: tap water sits for usually 24-48hrs +. pH usually at 6.3-6.6 and I measured the runoff at some point about a week ago and it was similar to what went in.

-Strain and age various autos from Linda seeds. Sprouted may 18, so starting week 7 today

-Climate: rh 40-50%. Temps generally 80-90f

- Light used: LEDs. Mehzi single cob, purple King led light, 3 spot bulbs with dome removed. Total wattage for lights is 300w at the wall.

-Additional info: fan leaves have been yellowing since bloom. Thought maybe more N helps but I see some tip burn when turning it up a little.

@weira - tagging you to hopefully get more eyeballs on this

Thank you very much
Karl

 

[Mr Green Fingers]

Looks like Potassium deficiency to me but wait for confirmation from one of the experts

 

[karlkutta]

Looks like Potassium deficiency to me but wait for confirmation from one of the experts

Good call. A few leaves show some brown specs on the yellow... I'm gonna try to attach one that shows that.


Also let me add that the only nutes I have on hand are the calmag and the sensi grow and bloom. If additional nutes are recommending I am open to product suggestions.

Thanks Karl

 

[Mr Green Fingers]

Good call. A few leaves show some brown specs on the yellow... I'm gonna try to attach one that shows that.


Also let me add that the only nutes I have on hand are the calmag and the sensi grow and bloom. If additional nutes are recommending I am open to product suggestions.

Thanks Karl

Yeah I would say you need a pk boost or a flowering booster, I use both in bloom.
Canna Pk 13/14 is cheap and you only need a small amount so a 250ml bottle will last
Flowering boosters are expensive, I am using Dutch Pro explode but when this runs out I am going to try Green planet Massive as much cheaper!

 

[karlkutta]

Thanks for that! Is it recommended to add it to every feed? I usually add my nutrients all the time unless I have to water remotely or do a flush.

 

[Mr Green Fingers]

The bloom booster I run throughout flower and the Canna PK 13/14 I just run it for 1 week after the buds have filled in to start them putting on weight and to add density but I think other people run it at lower dosages throughout flower.
I would guess you would use it everytime you feed nutes but I'm in DWC so not sure about soil