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Offlineeos666
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Registered: 08/28/13
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Top leaf edges turing yellow?
    #687721 - 10/05/13 02:54 PM (3 years, 2 months ago)

hello, please help me diagnose my patient:

strain: Nebula
substrate: plagron growmix
lights: 600w ndl
watering: every 24h
nutes: 4ml plagron algo bloom per 1l

the plants are in week 3-4 of flowering

as you can se the top leaf edges are turning yellow - any idea what this is?






Edited by eos666 (10/06/13 07:35 AM)


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InvisibleHawksresurrection
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Re: Top leaf edges turing yellow? [Re: eos666]
    #687723 - 10/05/13 03:17 PM (3 years, 2 months ago)

There is a questionnaire at the top of this forum.  Please fill that out completely and we'll try and get it figured out for you.


--------------------
Dude she isn't as young as she use to be.

-niteowl


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Offlineeos666
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Re: Top leaf edges turing yellow? [Re: Hawksresurrection]
    #687727 - 10/05/13 04:09 PM (3 years, 2 months ago)

Growers: 1. Are you growing from seed or clones? Clones
2. How old are your plants? 3-4 week of flower
3. How tall are your plants? About 40cm
4. What size containers are they planted in? 6.5l
5. What is your soil mix?plagron growmix
6. How often do you water and what type of water do you use and how much you give per watering? Every 24h tap water with nutes mixed in 1.5l per 5 plants roughly 200ml per plant
7. What is the pH of your water? No idea about 7 after testing with phtester drops
8. What kind of fertilizer do you use and what is its NPK ratio? Plagron alga bloom
9. Do you foliar feed or spray your plants with anything? No
10. What kind of lights do you use and how many watts combined? (HPS, MH, fluorescent, halogen, incandescent "plant lights") 600w ndl
11. How close are your lights to the plants? About 50cm
12. What size is your grow space in square feet? 1 sqm
13. What is the temperature and humidity in your grow space? 21c night  27-30c light14. What is the pH of the soil? No idea
15. Have you noticed any insect activity in your grow space? No
16. How much experience do you have growing? A little


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Offlineeos666
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Re: Top leaf edges turing yellow? [Re: eos666]
    #687731 - 10/05/13 04:47 PM (3 years, 2 months ago)

Also i just tested the ph of runoff water and its between 6.5 and 7 according too ph test drops


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Re: Top leaf edges turing yellow? [Re: eos666]
    #687732 - 10/05/13 04:55 PM (3 years, 2 months ago)

Well to start, you are WAY underwatering.  You don't want to give so little, so often.  You want to give each plant about 3-4 liters, wait for them to dry up quite a bit and then repeat. 


I think you may have a micronutrient issue.  When I get back from vacation tomorrow I'll have a better diagnoses.


--------------------
Dude she isn't as young as she use to be.

-niteowl


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Offlineeos666
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Re: Top leaf edges turing yellow? [Re: Hawksresurrection]
    #687743 - 10/05/13 06:41 PM (3 years, 2 months ago)

Quote:

hawksapprentice said:
Well to start, you are WAY underwatering.  You don't want to give so little, so often.  You want to give each plant about 3-4 liters, wait for them to dry up quite a bit and then repeat. 


I think you may have a micronutrient issue.  When I get back from vacation tomorrow I'll have a better diagnoses.



Are you sure? They are in about 5-6l of soil each 3-4l of water seems excessive? When watering every 24h i give them water just when the lights go on and they usually dont show any dryness symptoms at all, no hanging leaves. I use a 1.5l bottle and devide it up on 5 plants then refill.

How would i solve a micronute issue, i thought alga bloom is a complete solution?


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Re: Top leaf edges turing yellow? [Re: eos666]
    #687764 - 10/06/13 12:15 AM (3 years, 2 months ago)

Yes I'm sure.  Watering that small of an amount will leave dry pockets in the soil.  Dry pockets in the soil mean that there are spots taht aren't going have healthy roots.

The process of the soil drying out brings air into the root system, which is critical.  Like I said, when I get home tomorrow I will look up what's going on.  It looks familiar I can't quite place it though.


--------------------
Dude she isn't as young as she use to be.

-niteowl


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OfflineTomCollins


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Re: Top leaf edges turing yellow? [Re: Hawksresurrection]
    #687780 - 10/06/13 03:51 AM (3 years, 2 months ago)

PH issues could be causing some kind of lock up.


--------------------
andyistic said:
Ok so let me bring you idiots up to speed.
The admins are tired of this shitfest being made the joke of the weed community on the Internet.


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Offlineeos666
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Re: Top leaf edges turing yellow? [Re: TomCollins]
    #687783 - 10/06/13 06:02 AM (3 years, 2 months ago)

is it serious though, will it lead to my plants dying or loosing much yield? how can i lower my soil ph with ph - ?


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OfflineTomCollins


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Re: Top leaf edges turing yellow? [Re: eos666]
    #687784 - 10/06/13 06:20 AM (3 years, 2 months ago)

Quote:

eos666 said:
is it serious though, will it lead to my plants dying or loosing much yield? how can i lower my soil ph with ph - ?




Soil is a little more forgiving that hydro in terms of PH swings. I do not have any experience with growing in soil, but it's critical the plants stay within a the right ph range throughout their lives. If the PH is off, the plant can't take up certain nutrients - imagine growing up your whole life without any protein or vitamin c. It's also very hard to diagnose the plant without knowing the ph.

It's pennies to get a ph test kit and ph buffers, so you really should just go get those things - because they are vital tools.

You can adjust the ph of your soil by flushing the plants with PH'd water - check the run off. Repeat until the runoff is within the range you want, then your solution is in that range. Make sure you really flush it.


--------------------
andyistic said:
Ok so let me bring you idiots up to speed.
The admins are tired of this shitfest being made the joke of the weed community on the Internet.


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Offlineeos666
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Re: Top leaf edges turing yellow? [Re: TomCollins]
    #687785 - 10/06/13 06:55 AM (3 years, 2 months ago)

Quote:

DonkeyDong69 said:
Quote:

eos666 said:
is it serious though, will it lead to my plants dying or loosing much yield? how can i lower my soil ph with ph - ?




Soil is a little more forgiving that hydro in terms of PH swings. I do not have any experience with growing in soil, but it's critical the plants stay within a the right ph range throughout their lives. If the PH is off, the plant can't take up certain nutrients - imagine growing up your whole life without any protein or vitamin c. It's also very hard to diagnose the plant without knowing the ph.

It's pennies to get a ph test kit and ph buffers, so you really should just go get those things - because they are vital tools.

You can adjust the ph of your soil by flushing the plants with PH'd water - check the run off. Repeat until the runoff is within the range you want, then your solution is in that range. Make sure you really flush it.




i tested the runnoff water from one pot it was around 6.5-7.

someone else suggested it could be calmag def and adding some epsom salt?


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Offlineeos666
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Re: Top leaf edges turing yellow? [Re: eos666]
    #687786 - 10/06/13 07:36 AM (3 years, 2 months ago)

here are soke better pics



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Re: Top leaf edges turing yellow? [Re: eos666]
    #687800 - 10/06/13 04:06 PM (3 years, 2 months ago)

I think you are dealing with Mg deficiency. 


I would get some cal/mag if it is available where you live, if not epsom salt can work.


--------------------
Dude she isn't as young as she use to be.

-niteowl


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Offlinebudgrowerwannabe
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Re: Top leaf edges turing yellow? [Re: Hawksresurrection]
    #687831 - 10/06/13 10:12 PM (3 years, 2 months ago)

I was looking at some pics and that kinda looks like this pic of (K) toxicity?:wellidunno:


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Re: Top leaf edges turing yellow? [Re: budgrowerwannabe]
    #687835 - 10/06/13 10:30 PM (3 years, 2 months ago)

That wouldn't make any sense.  Potassium toxicity causes lock out of all sorts of nutrients, and will usually cause symptoms of those.  Magnesium is one of those that are locked out.  So while it's possible, I'm not betting on it.


How often are you feeding it.


--------------------
Dude she isn't as young as she use to be.

-niteowl


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Offlinebudgrowerwannabe
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Re: Top leaf edges turing yellow? [Re: Hawksresurrection]
    #687838 - 10/06/13 10:46 PM (3 years, 2 months ago)

I saw it in the thread at the top . the pic Its like half way down in the thread?  Have a look?


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Re: Top leaf edges turing yellow? [Re: budgrowerwannabe]
    #687839 - 10/06/13 10:53 PM (3 years, 2 months ago)

That was toxic salt build up dude.


Like I said, earlier Potassium tox will show up as more than one deficiency.


Look at the top pictures in the same thread, expand the Mg pic.


--------------------
Dude she isn't as young as she use to be.

-niteowl


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Re: Top leaf edges turing yellow? [Re: Hawksresurrection]
    #687841 - 10/06/13 11:01 PM (3 years, 2 months ago)

Good deal Hawk your the TC  What do i know?:blazed:


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Offlineeos666
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Re: Top leaf edges turing yellow? [Re: eos666]
    #687910 - 10/07/13 06:57 AM (3 years, 2 months ago)

i was feeding them with every watering every 24h with 4ml of alga bloom to 1.5l water - im thinking the whole issue might have been over fert.  - i flushed the plants yesterday and will try to recover them using plain water and rhizotonic and maybe some light nutes.


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Re: Top leaf edges turing yellow? [Re: eos666]
    #687931 - 10/07/13 12:42 PM (3 years, 2 months ago)

Now that you have flushed them.  STOP WATERING EVERY DAY.  Do it once a week, or when the soil is dry. 


Feel the weight of them right now.  Now feel them once every couple days, then when they are quite a bit lighter, water.


Still looks like Mg deficiency to me.  Which could be caused by lock out from over feeding.


--------------------
Dude she isn't as young as she use to be.

-niteowl


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