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Need help with brown marks

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Need help with brown marks

Tazzmania 34 Replies 5,117 Views
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Tazzmania

Tazzmania

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Hello
I started seeing these brown marks on leaves, could not identify the problem

i give calmag every feeding 5ml/gal
Stage: week 4 of flowering
 

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I mixed foxfarm ocean forest soil and coco, also using foxfarm nutrients starter package
following fox farm nutr. schedule, giving nutrients once a week
using 5 gal pots
Humidity levels around %45, but i watered them today so its aroung %55 right now

Thanks for checking, added more pics
 

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Have you flushed at all? And it looks like your temp dropped to 59F? Wouldn’t let it get that cold and temp should only shift 5 degrees from lights on to off. Would elevate your pots so they get good air flow. I know with the fox farm lineup they recommend flushing to mitigate the salt buildup with the grow big and tiger fox. I had a similar thing happen and think it was due to locking out the soil. Not 100% positive and would wait for some pros to chime in on but I would make sure to flush and feed at 1/4 of the recommended feeding.
 
Last edited:
Looks like a phosphorus deficiency or lockout.

What's the pH? If it's below 6, raise it to between 6 and 6.5.

You might want to boost P and cut back a little on cal/mag, which can interfere with P uptake.

Recently, I boosted P too much in flower and caused K lockout, so avoid overkill.
 
Looks like a phosphorus deficiency or lockout.

What's the pH? If it's below 6, raise it to between 6 and 6.5.

You might want to boost P and cut back a little on cal/mag, which can interfere with P uptake.

Recently, I boosted P too much in flower and caused K lockout, so avoid overkill.
I agree with @mysticepipedon. Prob locked out P and should cut back on the cal/mag. Check PH and if to low flush. Just some other useful information …. Recharge is a great product for soil health. Dolomite lime as a top dressing can help a low soil PH. I dropped fox farm nutrients and started using roots organic HPK rather than tiger bloom. The fox farm nutrients highly depend on flushing routinely. Make sure you have good airflow to your roots and add more drainage to make sure your getting adequate run off to avoid salt buildup in the root zone.
 
Have you flushed at all? Yes i flushed 3 weeks ago, since i watered them yesterday (sat) im planning to flush again on tuesday.
And it looks like your temp dropped to 59F? Wouldn’t let it get that cold and temp should only shift 5 degrees from lights on to off. i thought it would be ok, :/
Would elevate your pots so they get good air flow. ok, i will elevate my pots, trying think what could i use?
I know with the fox farm lineup they recommend flushing to mitigate the salt buildup with the grow big and tiger fox. I had a similar thing happen and think it was due to locking out the soil. Not 100% positive and would wait for some pros to chime in on but I would make sure to flush and feed at 1/4 of the recommended feeding. i think i will stop using foxfarm products, once i finish them.. any recommendations appreciated.

Looks like a phosphorus deficiency or lockout. 🆗

What's the pH? If it's below 6, raise it to between 6 and 6.5. Usually its between 6-6.5 but the other day i tested my tap water and checked the ph every hour for few times and readings were different ..

You might want to boost P and cut back a little on cal/mag, which can interfere with P uptake. ok il try cutting calmag 💹 P

Recently, I boosted P too much in flower and caused K lockout, so avoid overkill.

I agree with @mysticepipedon. Prob locked out P and should cut back on the cal/mag. Check PH and if to low flush. Just some other useful information …. Recharge is a great product for soil health. Dolomite lime as a top dressing can help a low soil PH. I dropped fox farm nutrients and started using roots organic HPK rather than tiger bloom. The fox farm nutrients highly depend on flushing routinely. Make sure you have good airflow to your roots and add more drainage to make sure your getting adequate run off to avoid salt buildup in the root zone.

Since i bought the starter package, it came with all below, maybe i need to cut back calmag and flush them
+ i was following fox farms recommended dosage, probably i should cut that in half too..
1644195213571
 
Have you flushed at all? And it looks like your temp dropped to 59F? Wouldn’t let it get that cold and temp should only shift 5 degrees from lights on to off. Would elevate your pots so they get good air flow. I know with the fox farm lineup they recommend flushing to mitigate the salt buildup with the grow big and tiger fox. I had a similar thing happen and think it was due to locking out the soil. Not 100% positive and would wait for some pros to chime in on but I would make sure to flush and feed at 1/4 of the recommended feeding.
Best temps are 76 during lights on and 60 at lights off. This is the magic zone for growing weed.

Looks like you are having pH issues that is slowing mag uptake. Run a slurry test.

Slurry Test
 
Elevating pots - I put golf balls under my pot in the tray. Had multiple folks recommend this along with additional drainage holes to avoid root rot due to poor drainage along with assuring roots get oxygen.

PH - Assuming you have a ph pen/meter. If you do google soil slurry test and do one to make sure your soil is at the correct PH. Your water could be at the correct ph but salts could be building up resulting in low PH and nutrient lockout.
 
Elevating pots - I put golf balls under my pot in the tray. Had multiple folks recommend this along with additional drainage holes to avoid root rot due to poor drainage along with assuring roots get oxygen.

PH - Assuming you have a ph pen/meter. If you do google soil slurry test and do one to make sure your soil is at the correct PH. Your water could be at the correct ph but salts could be building up resulting in low PH and nutrient lockout
Best temps are 76 during lights on and 60 at lights off. This is the magic zone for growing weed.

Looks like you are having pH issues that is slowing mag uptake. Run a slurry test.

Slurry Test
Always learning something from the pro @ComfortablyNumb. Didn’t realize 60F was the desired temp at lights off.
 
Elevating pots - I put golf balls under my pot in the tray. Had multiple folks recommend this along with additional drainage holes to avoid root rot due to poor drainage along with assuring roots get oxygen.

PH - Assuming you have a ph pen/meter. If you do google soil slurry test and do one to make sure your soil is at the correct PH. Your water could be at the correct ph but salts could be building up resulting in low PH and nutrient lockout

Always learning something from the pro @ComfortablyNumb. Didn’t realize 60F was the desired temp at lights off.
It mimics the cool fall evenings and causes the plant to pump out more trichs and change to harvest colors.
 
Best temps are 76 during lights on and 60 at lights off. This is the magic zone for growing weed.

Looks like you are having pH issues that is slowing mag uptake. Run a slurry test.

Slurry Test
resetted my thermometer, yesterday reading was min 59- max 65, will try to increase that
Slurry test results: PH 6.3 / ppm 722-733 😲 nutrient lockout?
if i need to flush, should i wait until plant gets dry?

Elevating pots - I put golf balls under my pot in the tray. Had multiple folks recommend this along with additional drainage holes to avoid root rot due to poor drainage along with assuring roots get oxygen.

PH - Assuming you have a ph pen/meter. If you do google soil slurry test and do one to make sure your soil is at the correct PH. Your water could be at the correct ph but salts could be building up resulting in low PH and nutrient lockout
"putting golf balls" great idea!, thanks
 
resetted my thermometer, yesterday reading was min 59- max 65, will try to increase that
Slurry test results: PH 6.3 / ppm 722-733 😲 nutrient lockout?
if i need to flush, should i wait until plant gets dry?


"putting golf balls" great idea!, thanks
What are you growing in?
Lets see a pic from the side and the top.
 
Fox Farms is not a good soil.
Tiger Bloom causes problems, drop that.
Why all this stuff? You don't need most of it to grow good plants.
With this much stuff added, I'm not surprised there is a lockout.
You need to bring your pH down to 5.5-5.8 since you are feeding hydro style.
 
I think I don't use any of that. I am an organic grower.

Tiger Bloom is bad.
If you want to feed nutes, then I'll call someone to help you out.
@Frankster @Dirtbag @tobh @Aqua Man
 
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