yellow top leaves

iron joint

iron joint

Active Member
I havent been able to find a deficiancy that matches what im seeing in my plant. i have two northern lights from nirvana seeds. I started them in 18oz cups then moved them to 64oz pots, they definitly arnt root-bound yet. They are under a 400w HPS light. The one plant looks healthy and, since i took the pictures 2 days ago, is showing much better color and growth.

The plant im concerned about is continuing to grow. The new leaves are mostly yellow but the tips are a nice dark green, healthy looking tips. i havent seen anything like this with my last grow. they are in FF soil.
 

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Snow Crash

Snow Crash

Well-Known Member
Iron and/or Zinc and/or Sulfur deficiency. A good micro nutrients supplement would be best. Dolomite lime would work well as a top dressing to provide some of these elements as well.
 
Bublonichronic

Bublonichronic

Well-Known Member
iron joint said:
I havent been able to find a deficiancy that matches what im seeing in my plant. i have two northern lights from nirvana seeds. I started them in 18oz cups then moved them to 64oz pots, they definitly arnt root-bound yet. They are under a 400w HPS light. The one plant looks healthy and, since i took the pictures 2 days ago, is showing much better color and growth.

The plant im concerned about is continuing to grow. The new leaves are mostly yellow but the tips are a nice dark green, healthy looking tips. i havent seen anything like this with my last grow. they are in FF soil.
Click to expand...
what nutes are you useing? FoxFarm BigBloom is the shit...
 
iron joint

iron joint

Active Member
I just use 1 table spoon of grow big since they are still very small (7 inches). Maybe its because i am not giving it big bloom that this problem happend. But i didnt it this way last grow and didnt have a problem. could be because last time it was an unknown, bagseed strain. Are there micro nutrients in bigbloom that are not in growbig?
 
Serapis

Serapis

Well-Known Member
PH Problem


It's an Iron deficciency and it is common in soil grows where the PH exceeds 6.5 The soil should have plenty of nutes in it. Before adding more, and then possibly burning the roots when the PH adjusts later, flush the plant now and get the PH down below 6.5 and the problem should correct itself. If the soil nutes are spent, any nute with potassium will do.
 
mr. green thumb 01

mr. green thumb 01

New Member
defiantly high ph same thing happend to me when i didn't check my ph in my dwc and when i did it was 7.3 ahh but i lowered the ph and it went away. whats your ph?
 
Bublonichronic

Bublonichronic

Well-Known Member
iron joint said:
I just use 1 table spoon of grow big since they are still very small (7 inches). Maybe its because i am not giving it big bloom that this problem happend. But i didnt it this way last grow and didnt have a problem. could be because last time it was an unknown, bagseed strain. Are there micro nutrients in bigbloom that are not in growbig?
Click to expand...
BigBloom is a base nurtien...it is to be used threw the WHOLE grow...it is 100% organic also...
 
iron joint

iron joint

Active Member
In my last grow i soaked my soil throughly before use so that i wouldnt have any dry spots. I didnt do that this time. I probably lowered my ocean forest soil PH to a safe level in my last grow. alright ill just flush the plant and add the fox farm trio nutes as the plant needs it. I dont have a PH meter, but everything ran very well in my last grow without it.
 
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