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Old 10-15-2016, 04:01 PM   #1 (permalink)
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Unhappy Please diagnose my plants

My 3 indoor plants (replanted 3 weeks ago into 6gallon pots) all showing same symptoms.
- They live in DIY soil mix (vegetable soil mix with added sheep manure and worm castings)
- 18/6 light under 800W LED (3ft away)
- leaf tips brown, some pointing up, some straight
- I didn't add any chemical fertilizers
- I flushed the plants 2 days ago with 2 gallons of filtered water each, still think the yellowing increases!!!!
Please help!

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Old 10-15-2016, 04:31 PM   #2 (permalink)
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Someone answer the poor guy so we can at least pretend we still are an effective source of marijuana information lol.
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Old 10-15-2016, 04:39 PM   #3 (permalink)
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I'm not 100% sure, but I would try pulling the light back more. How tall are the plants? 3 ft doesn't seem much for an 800w light.
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Old 10-15-2016, 07:02 PM   #4 (permalink)
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Someone answer the poor guy so we can at least pretend we still are an effective source of marijuana information lol.
hehe, thanks for your support

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I'm not 100% sure, but I would try pulling the light back more. How tall are the plants? 3 ft doesn't seem much for an 800w light.
Thanks for your suggestion
I had the light backed to over 4ft, made no difference.
New growth (both on top and also lower branches/leaves) look good, it's the larger/older fan leaves look like this.
Plants are about 13'' tall, they are roughly 5-6 weeks old clones. I got them 3w ago, at 5''.

So you don't think it's nute burn?
If not that, than some nute deficiency?
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Old 10-16-2016, 12:00 AM   #5 (permalink)
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- I flushed the plants 2 days ago with 2 gallons of filtered water each, still think the yellowing increases!!!!
Please help!



Too much water.

More sun.

dark green leaves weed
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Old 10-16-2016, 01:20 AM   #6 (permalink)
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Too much water.

More sun.

dark green leaves weed
Thanks for your idea, but it can't be that. I flushed them BECAUSE of the yellowing, thinking that it might be nute burn.
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Old 10-16-2016, 06:46 AM   #7 (permalink)
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How do the rest of the tips look? Are any kind of turned to the side a bit? Just the leaf tips I mean?
Lower leaves dying from the bottom up and starting at the tips is usually a sign of magnesium deficiency. Like tomato plants they need a fair bit of magnesium over their life span.
A better overall plant picture may help in diagnosis.

If it turns out that the tips are turned add a table spoon of Epsom salts to a gallon of water and feed. Add the salts to a bit of hot water to dissolve and add that to the gallon.
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Old 10-16-2016, 06:47 AM   #8 (permalink)
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Hi Budsniffer
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Old 10-16-2016, 09:02 AM   #9 (permalink)
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Have you checked the Ph? How fresh is the manure? Do the pots have good drainage?
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Old 10-16-2016, 09:14 AM   #10 (permalink)
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I am in agreeance with Dan, a nutrient deficiency most likely magn or Nitrogen, but possibly over watering on top of that which not only stripped the plants of nutrients but soaked the small new roots until they couldn't take up any more nutrients to help.
dan once posted a nutrient deficiency chart... I'll try to locate it...
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Old 10-16-2016, 09:23 AM   #11 (permalink)
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Cool

That was easy
File says I got it from Farmer Giles...maybe he got it from Dan?
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Old 10-16-2016, 09:27 AM   #12 (permalink)
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As far as the light goes, read up on Lumens and how far an 800w actually pushes useful light. At three feet you are getting the light energy transfer of a dark cloudy evening. if heat is an issue, add a fan and move the light closer.
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Old 10-16-2016, 09:54 AM   #13 (permalink)
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Quote:
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Hi Budsniffer
Hey Dan! Long time no see! Appreciate your help... it's hard for me to figure out some of this stuff...
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Old 10-16-2016, 02:57 PM   #14 (permalink)
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Have you checked the Ph? How fresh is the manure? Do the pots have good drainage?
pH is just under 7. Manure was in the bag for months, but not on a compost pile. It's sheep manure of the dry sort, without the wee. Yes, puts have good drainage.

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As far as the light goes, read up on Lumens and how far an 800w actually pushes useful light. At three feet you are getting the light energy transfer of a dark cloudy evening. if heat is an issue, add a fan and move the light closer.
Is that true for LED lights, too? Heat is not an issue, but apparently LED light can burn without heat.

Thanks everyone, I'll try and post another photo or two. Thanks for the chart, too. I have that one, and another one, too, but can't really decide what I see there. Too many possibilities, too easy to make mistake.
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Old 10-16-2016, 04:07 PM   #15 (permalink)
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I hope the above photos will help sort this out.
Here's another chart I scooped up on the net:

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Old 10-16-2016, 05:07 PM   #16 (permalink)
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Hey thank both of ya'll for the charts, I snitched 'em!
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Old 10-16-2016, 05:56 PM   #17 (permalink)
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Im talking out of my ass here, but comparing to the chart, it looks like potassium deficiency.
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Old 10-16-2016, 08:44 PM   #18 (permalink)
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Im talking out of my ass here, but comparing to the chart, it looks like potassium deficiency.
That's what I thought, too, but I'd rather have it confirmed.
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Old 10-17-2016, 02:31 PM   #19 (permalink)
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According to this link, it could be because of the stress of transplanting. I've never personally experienced this but I find it highly unlikely that you have a potassium deficiency in a mix that includes soil.

Potassium Deficiency | Grow Weed Easy
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Old 10-17-2016, 03:33 PM   #20 (permalink)
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Thanks @mothernature, I think I'll settle on potassium deficiency, and try to correct it. If it doesn't get better, I'll have to look further.
Cheers to everyone, a very helpful group! Glad to have found you
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