Auto Jack Herer Deficincy or...?!?

[icgreen]

Hey guys,
My girl is 50 days old 30 days in flower and the leaves are turning yellow with a lil brown on the edges. I use Canna Terra Flores 1.3, BAC Silica Power 0.1 and PK Furry 0.1 (18-19 pk), molasses 2ml/L . The pH is 6-6.5, 5L pot, temps 28-32C humidity 30-35, light 2x32w CLF + 10w LED warm.
My gueses are N def, K def or light burn? Btw im a newbie.
Thanks.

 

[Chester]

Nice plant ... I think it's a CalMag deficiency ...

 

[Ripper]

Could be cal mag also could be she is making a run at finishing and sucking the fan leaves dry.. Is she still consuming a lot of feed or is she slowing down?

 

[icgreen]

This happend just after i added the PK(18-19) in the wather b4 she looked better.

Could be cal mag also could be she is making a run at finishing and sucking the fan leaves dry

I hope she is not making a run i hope for another 3-4 weeks...

Is she still consuming a lot of feed or is she slowing down?

The growth in height stoped at day 43, i dont know if she stils eats. I give her 1 water 1 feed at 5 days 1.5L

 

[Ripper]

Have you backed off the pk a little?

 

[icgreen]

I feed with PK just once...
Tomorrow i need to give her some wather...should i put a little veg fert ?

 

[Ripper]

Not familiar with the nutes your using maybe @Waira can help better

 

[Waira]

IC-- are you in soil, or coco?-- this can make a big difference! I assume the pH is referring to your nute solution? If so, what i need is a in-medium pH, either from a quality probe or a properly done run-off test ( https://www.autoflower.org/threads/...-testing-and-ph-estimation.41733/#post-928975 ) .... This is not a Ca or Mg issue, but more than one thing is off here... you say the tip burn and color fade happened after you added the PK booster, right? Did you dilute it, or go full strength? It's hard to tell in the pics-- is it the top zones that are faded the most? --how do the lowers look in comparison? This fits S defc.,...The symptoms affecting the margins are likely K related, but whether it's K tox. or defc. will depend on the info you get me,...

 

[Ripper]

Love learning from you sir @Waira

 

[icgreen]

@Waira
Medium is soil.I just gave her today plain water the run-off waz around 6.3
The edges now turn in a purplish colour and some stems.
I used 0.1ml/L of PK, on the bottle it says betwen 0.5-1 ml/L
The older bottom leaves are N def and the leaves that are in the middle look better than the top ones, and i saw some brown spots on the leaves(3-4 leaves)

LE:And if it`s S def can i spay with epsom salt 1/2 to 1 teaspoon per gallon???