Potassium deficiency or overwatering??? Need help

[PoteyMagots]

First grow ever, lots to learn. Week 5 of flowering and the fan leaves are turning yellow. I've also got brown tips slightly curling down. It gets 1.5L every other day in a 5 gallon fabric pot with nutrients every other watering. My first thought was potassium deficiency this late into flowering. Any input would be very appreciated.

 

[RonnieB2nd]

Nute burn? Just top leaves or bottom leaves too? If just top leaves its your light being too close. All leaves nute burn.

 

[mysticepipedon]

I can't tell what part of the plant those leaves are on.

You do have a little nute burn, judging by that last pic. Nothing to be concerned about.

 

[OntarioGoldenHash]

Light burn looks like this

 

[IhatePM]

Looks like mag deficiency to me

 

[GNick55]

 

[ComfortablyNumb]

Is it from the bottom up or did it start top down, or everywhere? That will tell you what to look for.

Bottom up, it's nute related.
Top down, Light/air/wind related.
Everywhere at once, Root related.

Yes, that's an oversimplification, but it is very accurate.

 

[PoteyMagots]

Appreciate the help everyone, awesome app. I did give the recommended "heavy dose" this feeding and from what I've gathered here along with the stage the plant is in, I believe I've got a combination of slight nute burn and a calmag deficiency. I will add the calmag to the next feeding and go light on the nutes and see where I'm at.