what causes these spots

[Brigand13]

Does anyone know what these spots are an indication of?

 

[Peksman]

hm hm looks like calcium def...would need more info

 

[HeadyPete]

ph imbalance, overferting.....

 

[Brigand13]

These plants have had FF grow big at 1/2 strength and occasional cal/mag.
ph of feed/ water is app 6.5-6.8. Some plants have this and others dont. Been getting this for a while now (several grows) and I have adjusted nutes up and down a little and problem is stiill here.
What I really need to know is what this is. After I find that out I'll work on a solution.Can sombody say with certainty what this is. The 1st 2 responses (thanks guys) might be right but I need to be sure before I proceed so I dont make a bad situation worse.
Thanks
B13

 

[loko17]

"What I really need to know is what this is. After I find that out I'll work on a solution.Can sombody say with certainty what this is."

Well people need to know more about your grow. How about feeling this form up and I bet u will heve more responses!
http://www.icmag.com/ic/showthread.php?t=11688

A pic of entire plant would be helpful as well!
Cheers!

 

[Movintarget]

I would say correct/flush with Ph corrected H2o, then leave it alone till the soil drys. By this time you should see new growth,(depending on size of plant & container) look at your new leafs, take a pic and get back to us.......Good Luck

 

[green_farmer]

These plants have had FF grow big at 1/2 strength and occasional cal/mag.
ph of feed/ water is app 6.5-6.8. Some plants have this and others dont. Been getting this for a while now (several grows) and I have adjusted nutes up and down a little and problem is stiill here.
What I really need to know is what this is. After I find that out I'll work on a solution.Can sombody say with certainty what this is. The 1st 2 responses (thanks guys) might be right but I need to be sure before I proceed so I dont make a bad situation worse.
Thanks
B13

Definately a deficiency brought about by higher ph levels locking out certain nutes.

I suggest you bring your ph down - I run between 5.5 to 6.3 no higher. Depending upon strain. Check out other threads here about ph levels and what MJ wants. 6.8 is a bit high for me.

Found this for you :
http://www.icmag.com/ic/showthread.php?t=125755&highlight=ph+levels&page=2

Read and learn, but your ph is too high and that is causing the deficiency. Imho

And yeah, a piccy of the entire plant and system you are using would help the experts here (not me) to help you.


Good luck!

 

[hazy]

looks like a bad cal lockout.

 

[Brigand13]

Thanks for all the good answers. Here is a pic of a leftover clone which shows the problem best and 1 of the keepers.

 

[Movintarget]

Morning,
I'm no expert, but you may want to move the clone in the first pic to a bigger container. Is that a dixie cup your using? Good luck

 

[otherwhitemeat]

I was going to give the same advise as greenfarmer and and Movintarget.

 

[habeeb]

looks like you have a P def unless you got a DJ or purple strain form the stem

not sure at all on the leaf

 

[Chiefsmokingbud]

That is no doubt A calcium def. I fought that for the better part of a year till I found out what it was. It usually started out at the serations as brown spots and move inward to the rest of the leaf. Also make sure your cal/mag is not old and milky looking.

 

[dank2hydro]

Definately a deficiency brought about by higher ph levels locking out certain nutes.

I suggest you bring your ph down - I run between 5.5 to 6.3 no higher. Depending upon strain. Check out other threads here about ph levels and what MJ wants. 6.8 is a bit high for me.

Found this for you :
http://www.icmag.com/ic/showthread.php?t=125755&highlight=ph+levels&page=2

Read and learn, but your ph is too high and that is causing the deficiency. Imho

And yeah, a piccy of the entire plant and system you are using would help the experts here (not me) to help you.


Good luck!

I agree, I had the same problem and I did what Green Farmer described above. Ph your water to 5.5-6.3 and the problem should stop getting worse.

 

[Hazy Lady]

That is a Potassium (K) deficit, the first leaf looks like a Cal problem though. You need to sort your PH as others have said. Can you tell us what medium you are in?.

 

[Core]

this is no def imo...rather a overferting issue...also roots can't handle big feedings in such a small cup...I've noticed that in my room using 2L pots.....roots will be needing more space..Once you transplant you should be fine

 

[Brigand13]

They're in ffof dirt. Most of you agree that ph is an issue, which is 1 of the few things I had'nt played with since this showed up. It will take a while to tell but I think Im on the right track now. Thanks