Can’t figure this one out!

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Smokeman710

Member
I got 2 plants that are about 4 weeks into flower. They both are starting to show some discoloration. Both should have had plenty of nutrients. I’m running fox farms ocean forest and I dry amend with dr earth all purpose fert 4-4-4 and their bloom fert 3-9-4 and some earth worm castings 13 days ago. Problem seemed to start right before I dry amended and very gradually got worse. I water with recharge every other watering. Otherwise just straight ph’d water. usually 6.3-6.6. Any ideas?
 

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polishpollack

polishpollack

Well-Known Member
well not entirely sure but from what you write and that bizarre color, it looks like a mix of over fert with heat damage. need to know the temp in the space, what kind of light and wattage, how close is the light?, is there a fan moving air? need more details. FFOF has ferts in it already.
 
The Gram Reaper

The Gram Reaper

Well-Known Member
polishpollack said:
well not entirely sure but from what you write and that bizarre color, it looks like a mix of over fert with heat damage. need to know the temp in the space, what kind of light and wattage, how close is the light?, is there a fan moving air? need more details. FFOF has ferts in it already.
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The color of the damage is changed because of a purple light. I think its orange for the most part.
 
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Smokeman710

Member
So the plants vegged for almost 11 weeks. That’s why I added the dry ferts. I have an led to the side on some different plants. That’s why it’s pink in the pic. These are under a 660w cmh from about 30-35 inches away. I have ac from my central air going into the room. Intake and exhaust fan. An oscillating fan and another small fan moving air in the room. Temps don’t get over 80 ever. Usually 78 at the highest and down to 70-72 with lights off. I haven’t sprayed anything on them.
 
The Gram Reaper

The Gram Reaper

Well-Known Member
Still thinking Manganese excess, but don't quote me on it.

This is from Dinafem:
  • Manganese excess: Young leaves develop a type of chlorosis characterised by dark orange to rust brown mottling, which gradually spreads to older leaves, significantly affecting plant vigour. This causes the plant to transpire more than necessary, eventually leading to iron and zinc deficiency.
 
Aussieaceae

Aussieaceae

Well-Known Member
Smokeman710 said:
So the plants vegged for almost 11 weeks. That’s why I added the dry ferts. I have an led to the side on some different plants. That’s why it’s pink in the pic. These are under a 660w cmh from about 30-35 inches away. I have ac from my central air going into the room. Intake and exhaust fan. An oscillating fan and another small fan moving air in the room. Temps don’t get over 80 ever. Usually 78 at the highest and down to 70-72 with lights off. I haven’t sprayed anything on them.
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When you added the dry ferts did you lime as well, or does it contain heaps already? (the fertilizer, not the soil)
 
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Smokeman710

Member
The Gram Reaper said:
Still thinking Manganese excess, but don't quote me on it.

This is from Dinafem:
  • Manganese excess: Young leaves develop a type of chlorosis characterised by dark orange to rust brown mottling, which gradually spreads to older leaves, significantly affecting plant vigour. This causes the plant to transpire more than necessary, eventually leading to iron and zinc deficiency.
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Is there a fix? It started before I amended, is there a chance it could be something else?
 
Aussieaceae

Aussieaceae

Well-Known Member
Smokeman710 said:
No lime in either of the ferts and I did not add lime
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All honesty i'd give a little gypsum as well and see if it slows down. Maybe not lime if the ph is ok. Gypsum shouldn't affect the ph and the calcium should help with nutrient absorption as well. Gypsum is more readily available too.
If i was able to rule out overwatering, or an acidic root zone, gypsum is where i'd be headed myself.

Best of luck, hope you figure out what's wrong.
 
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Smokeman710

Member
I guess it could be calcium. The ferts have sources of calcium though. It has me worried my ph pen is off but I literally just recalibrated it. Might need to add some Calmag to the water next time and see if it makes a difference. Or might try some gypsum. Never tried it before.
 
The Gram Reaper

The Gram Reaper

Well-Known Member
Smokeman710 said:
I guess it could be calcium. The ferts have sources of calcium though. It has me worried my ph pen is off but I literally just recalibrated it. Might need to add some Calmag to the water next time and see if it makes a difference. Or might try some gypsum. Never tried it before.
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Hard to tell, man, maybe some fresh eyes can look over the problem within the next day. I am pretty sure you can test your runoff ph and see what your plants are at. Don't quote me on that, I am more of a hydro/coco grower.
 
Aussieaceae

Aussieaceae

Well-Known Member
Imvho if you're using organic ferts and need calcium, you're generally much better off using organic calcium as well.

Lime if you need to neutralize the soil and gypsum if you don't.

Best of luck.
 
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Smokeman710

Member
The Gram Reaper said:
Hard to tell, man, maybe some fresh eyes can look over the problem within the next day. I am pretty sure you can test your runoff ph and see what your plants are at. Don't quote me on that, I am more of a hydro/coco grower.
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I have read that soil runoff isn’t a good way to test soil ph. But I really have no idea. I guess I can check it next time I water just to see.
 
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