Fan leaves turning yellow at the edges

Bill Bates

Bill Bates

Member
Dudes- I'm freaking out a little bit here! Since yesterday more leaves are turning yellow at the edges and curling up at the edges and the tips. What is happening? Ph is 7. Temp 62°-65°
 
Nafydad420

Nafydad420

Well-Known Member
7.0 PH is too high, also 62-65 is a little chilly. but looks to me like a magnesium deficiency.. whats your setup and routine?
 
drsaltzman

drsaltzman

Well-Known Member
I get the middle pic from time to time.
Usually I just use PH water, 1/2 strength CalMag and full strength Recharge for a couple days before resuming nutes.
It's not NPK. Something micro and PH related.
 
Bill Bates

Bill Bates

Member
Nafydad420 said:
7.0 PH is too high, also 62-65 is a little chilly. but looks to me like a magnesium deficiency.. whats your setup and routine?
Click to expand...
280w hps in a 2' x 4' area in my basement. I was running a small heater which brought temp up to about 70+/-, but it went south on me. I've been using 5-5-5 miracle gro stuff (I know it's not ideal, but it's what I had) but since I didn't want to use too much nitrogen during budding, I cut it out & used clear water for the last 2 waterings. This leaf condition has just begun in the last 4 or 5 days.
 
Bill Bates

Bill Bates

Member
Bill Bates said:
280w hps in a 2' x 4' area in my basement. I was running a small heater which brought temp up to about 70+/-, but it went south on me. I've been using 5-5-5 miracle gro stuff (I know it's not ideal, but it's what I had) but since I didn't want to use too much nitrogen during budding, I cut it out & used clear water for the last 2 waterings. This leaf condition has just begun in the last 4 or 5 days.
Click to expand...
 
worldspawn

worldspawn

Well-Known Member
Check out this page - http://www.growweedeasy.com/why-cannabis-leaves-yellow

It has a lot of pictures (symptoms) matched to causes. I would say looking at the pics and you said the ph was 7 its probably too high ph causing a magnesium deficiency, like other growers said. Is it in soil?

Mineral absorption to ph for Soil - http://www.growweedeasy.com/sites/growweedeasy.com/files/pH-nutrient-deficiency/soil-ph-chart-marijuana.jpg

Mineral absorption to ph for Hydro -
http://www.growweedeasy.com/sites/growweedeasy.com/files/pH-nutrient-deficiency/hydroponics-ph-chart-marijuana.jpg

Personally I ph to 6.1 and over two waterings it will drop to 5.5 (in my recirculating reservoir) and then i set it back which gives a nice coverage.

I wouldn't be letting temps go below 65, 70-79 is where i try to keep mine. Even if its not causing your problems, low temps equate to slow growth.
 
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Bill Bates

Bill Bates

Member
Welp, here they are, for the last 2 days. After using a diluted vinegar/water solution (1cup/gallon) THIS is my result! FUCK!! Ph is down to 6 - 6.5 but this thing seems to be dying.The soil is really, Really wet & all I can do is stand & watch.

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Bill Bates

Bill Bates

Member
Overwatered definitely. When i first attempted to lower the ph, my vinegar/water solution was too strong & the ph shot down to below 5. In a panic, I flushed it with clear water thinking (correctly, I assume) that it would bring the ph back up. What concerns me is that this particular plant was just starting to explode with new buds. I currently have it sitting in front of the fan & heater (temp about 72°) to try to help dry out the soil some. I imagine that it will come around to some degree but she was just so beautiful, you know? Its my first grow & I guess I'm like a first time parent. Do you have any other suggestions? How long should I wait before adding water & nutrients again?
 
Bill Bates

Bill Bates

Member
So, the weather finally broke here & I have placed my 2 females out in the sun... it's about 73°, sunny & slightly breezy. Hopefully, this will help.
 
Bill Bates

Bill Bates

Member
Day 48
This is what blue himalaya #1 looks like right now. Soil is still saturated so i drilled some more holes in the buckets and aerated thoroughly with a probe. pH is 6 - 7 depending on where you stick the meter (deeper is more acid). I have put it under led fluorescents in an attempt to stimulate leaves. They are on 20/4 schedule. Please help me put this fire out! Or is it even possible?
 

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