please help

Some of my leafs are starting to show yellowish striping and would like some input as to what it is.


From reading online to me it seems to be sulphur deficient or magnesium deficient.
Sorry for the bad pic as it was done with my phone and the light was on also. Can upload another pic tommorrow once lights go off.

It's hard to understand the picture.. All colors are almost the same.

Sorry about that but the lights are on. I will take another pic in the morning when the lights just go off.

Here is another pic that I took today with the lights off. I hope its better so ppl can help me with this problem.


Its happening in the mid section of the plant.
Temps with lights on is 72f and lights off 61.7f
Humidity with lights on arond 50% and lights off 75%
I have just switched to flower about 5 days ago and feed once with half strength bloom.
My light is a 600, 440cfm fan with carbon filter and 2 little os fans inside to move the air around.
I want to add another 600 but want to fix the problem with the plant first.

Any and all help/suggestions and ideas welcome/appreciated.

Anyone please help.

This yellowing is starting at the top of the plant to now. Can anyone please help me.
I've just given it a flush.

you may be letting the soil dry too much. I usually notice this when there's a claw and yellowing from the bottom too . the medium can get too dry and when the water dries the leftover nutrient salts crystalize and burn the roots. Hope this helps
Also maybe try giving it N food instead of K food... bloom boosters aren't really the best for cannabis IMO i like a nice nitrogen feed.

read this too while you're at it ! https://www.rollitup.org/marijuana-plant-problems/150004-plant-moisture-stress-symptoms-solutions.html

Yellowing leaves at the top are a sign of a micro nute def. I'd try a little cal/mag. If you have a cal def, then the plant can't uptake N.

as Nizza said feed with a grow nute and add 5ml/gal of cal-mag. If this is the problem it will look better in a day.

Get yourself some cal/max or something similar. GH has a product called calmag, I think that's the name, that should take care of this. What is your medium? Hydro will require calmag on every feeding for the next couple of weeks. The plants are starting to go into overdrive and will also require a boost of nutrients. If your in soil than once a week should be fine. Give them a dose and watch to see, it will start to ease up happen overnight if it is a mag. deficiency. You should be at your max nutrient solution at the stage your in right now. Good Luck

WattSaver said:

Yellowing leaves at the top are a sign of a micro nute def. I'd try a little cal/mag. If you have a cal def, then the plant can't uptake N.

as Nizza said feed with a grow nute and add 5ml/gal of cal-mag. If this is the problem it will look better in a day.

Click to expand...

Can I put cal/mag and dyna grow grow together?

whocares100 said:

Can I put cal/mag and dyna grow grow together?

Click to expand...

Yes you can WC. With your coco pots use 5ml/gal with perlite use 1ml/gal.

Thanks Watt, looks like your solo girl is doing well

My medium is coco. I'm gonna increase watering eds 3 days to see if there is a difference. If no difference by then i'll give some cal-mag.
Thanks for all the help. Will keep posted on what's happening.