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Old 07-10-2018, 09:17 AM #1
Dirrtybirdy
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Always happens in week 5-6 in flower.

Hey everyone,

This is my 3rd run. Everything was going good up until mid week 5. So for the last 2 runs this same issue has been happening. The leaves will start producing these little brown spots and on some leaves the edge of the fan leaves will turn brown and turn to a crisp. I'm not too sure what's happenning. At first I thought it was a calcium deficiency then it started to look like a potassium deficiency.

I tried to flush and reset the feed with 5ml/g of Calmag and a little more npk raw potassium . But it didn't really correct the issue and it seems like it slowed down the bud development. Im getting stuck on this problem that happens around this time, everytime.

Any help would be appreciated! Thanks!



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Old 07-10-2018, 09:51 AM #2
Rubber Chicken
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Seems like nute burn to my unscientific eyes?

I think you will get much better advice than mine, but if i see the very tips of leaves starting to yellow i just give water, and if it still spreads a little more then i flush with extra water.

I wont pretend to be a natural green thumb though.
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Old 07-10-2018, 10:11 AM #3
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How's your drainage?



wet feet will result in leaves like that. having said this, I don't want to contradict previous post. a flush will not make the problem worse as long as you're sure roots will dry out properly.


good luck ...
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Old 07-10-2018, 02:24 PM #4
Lester Beans
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Looks like pH is too low. Need some details.

Medium
Temps
Nutrients
pH
Rh
Etc
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Old 07-10-2018, 04:42 PM #5
Dirrtybirdy
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Quote:
Originally Posted by Lester Beans View Post
Looks like pH is too low. Need some details.

Medium
Temps
Nutrients
pH
Rh
Etc
Sorry, posted this late night and forgot the details.

Rockwool
75-79 day/60-62 nights
I'll get a list later today. Ppm was at 1700 now at 1200
5.8 pH
48-52 rh
Mix spectrum lighting (1000w led/nanolux de 1000)
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Old 07-10-2018, 04:44 PM #6
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I had leaves that looked like that before, it was caused by low PH.
Test the PH of your runout, I think you will find it low as lester pointed out above.
Best of luck.
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Old 07-10-2018, 04:46 PM #7
Dirrtybirdy
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Quote:
Originally Posted by Teddybrae View Post
How's your drainage?



wet feet will result in leaves like that. having said this, I don't want to contradict previous post. a flush will not make the problem worse as long as you're sure roots will dry out properly.


good luck ...
Drainage is fine. There's always a dry down to about 10-20% before watering again. Did a flush 6 days ago and it seemed to slow down the issue.
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Old 07-10-2018, 04:50 PM #8
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Ppm 1700 is the problem. Nutrient burn. Good you got it lowered. Flush really well and then feed half strength nutrients until normal growth resumes.

Everything else looks right on.

Good luck!
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Old 07-10-2018, 05:50 PM #9
Dirrtybirdy
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Originally Posted by Teddybrae View Post
How's your drainage?



wet feet will result in leaves like that. having said this, I don't want to contradict previous post. a flush will not make the problem worse as long as you're sure roots will dry out properly.


good luck ...
Drainage is fine. There's always a dry down to about 10-20% before watering again. Did a flush 6 days ago and it seemed to slow down the issue.
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Old 07-10-2018, 05:58 PM #10
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The biggest problem I see with plants that are having problems is when people use too much nutrients.

Less is more.
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