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Offlinepornstache
8====D ({})

Registered: 10/04/14
Posts: 1
Loc: Peoples Republic of Calif...
Last seen: 2 years, 12 days
Yellowing leaves... Possible Nitrogen N or Magnesium Mg Deficiency???
    #750963 - 10/04/14 04:14 AM (2 years, 2 months ago)

Hey all, hows it going everyone. Need some assistance with this grow.

They are having problems with lower and low middle leaves turning yellow. Old growth only.

They have been in FFOF for about 3 weeks, but they have been yellowing as soon as 10 days after transplant into OF. I had originally only been giving them Big Bloom at 1/2 strength with every watering, but later I read that RO water may need Cal Mag despite FFOF supposedly having it in there already. I have been giving 1ml/L GH Calimagic since the 20th of last month as recommended on the bottle. They have all received 3 waterings at this strength. The last watering included 1.75ml/L Pure Blend Pro Grow 3-2-4 on all my plants and the largest plant that is 5 days older received 3.5ml/L PBP. That plant showed what I thought to be signs of nute burn (yellowing of the tips and pointy edge things on the blades of the leaf) so I flushed with water.

I just got a pH meter last week and the pH runoff is showing a little low, around 6.1 or 6.2, and the nute solution I had fed with was way low, around 4 (and water started off at 6.3 before adding nutes) but that shouldn't matter if the runoff is above 6 right? Regardless I am now pH correcting everything I give them, last watering was CalMag only, pH adjusted to 7.1 to counteract the previous low pH feedings.

Don't know if this is a Mg or N deficiency as they both look the same to me and I have yet to see any high res comparison pics side by side.


My questions are as follows:

1) If its an N def then it must be a lockout issue right? (since they showed signs of nute burn when I gave more N; and since FFOF should not be N def. after less than 2 weeks)

2) Also I thought a pH of around 6.1 shouldn't necessarily be that bad and shouldn't cause lockouts...

3) If its a Mg deficiency then how long does it take to correct that? Is the 1ml/L enough or should I be using more?


And of course if its some other issue that I'm missing entirely please don't hesitate to tell me.

I really appreciate the help! Thanks in advance!





Pic #1 here is the one that's a week older that got slightly burned.

These next 8 are all the most recent:








These were when the first signs of yellowing was noticed on 9/17


And the first time I noticed yellowing between veins on 9/19




The full feeding record is as folows:

8/18 - Germ papertowel after soak 24H distilled water
8/20 - Plant in Lightwarrior in 9oz clear plastic cups
8/30 - 1/4 str FFBB
9/06 - 1.875 ml/L PBPg, 3.9 ml/L FFBB
9/10 - transplant to 1/2 gal FFOF 3:1 perlite
9/14 - water with 3.9 ml/L FFBB
9/17 - water with 3.9 ml/L FFBB
9/20 - water all with 1ml/L CaliMagic
9/26 - wilted due to underwater, water with 1mL/L CaMg, 7.5ml/L BB, 1.75ml/L PBPg,
          one plant with double strength (3.5 ml/L PBPg) showed signs of burn
10/01 - water with CaMg 1.5ml/L, pH adjusted to 7.1

*one plant is a week older, but the rest of the plants were born on 8/18


Questionnaire:

How long has this problem been going on?
Happens on all plants after they reach a certain age.
What strain are you growing?
WW
What was the establishing technique? (seed or clone?)
Seed
What is the age of your plants?
Planted germd sprouts on 8/20, transplanted to FFOF on 9/10
How long have they been in the soil mixture they are in now?
since 9/10
Were they in the same mixture when they were seedlings/smaller plant? If not, what mixture were they in before?
Germinated in lightwarrior. Might have kept them in there for a little too long and stunted them but when they went into OF they took off.
How Tall are the plants?
6-7 in maybe
What PHASE are the plants in?
veg
What size pots are you using? (Include how many subjects to pot)
approx 1/2 gal
What substrate/medium are you using?
FFOF 3:1 with perlite
What brand Nutrient's are you using?
GH Calimagic, FF BigBloom, Botanicare PBP Grow
How much of each nutrient are you using with how much water?
see above
How often are you feeding?
no set regiment yet, trying to feel them out and correct this deficiency
What order are you mixing your nutrients?
calimagic > bigbloom > PBP
What is the TDS/EC/PPM of your nutrients used?
dunno
What is the pH of the "RUN-OFF"?
around 6.1, tested with electronic tester
How often are you testing pH/ppm/EC/TDS?
every time I feed now
How often are you watering?
~ every 4 days, when they get dry
When was your last feeding and how often are you feeding?
see above
What size bulb are you using?
8x 23W CFL 5000k and 6500k
How old is your bulbs?
new
What is the distance to the canopy?
3"
What is your RH Factor? (Relative Humidity)
between 50-75%
What is the canopy temperature?
70-80F
What is the current Air Flow? (cfm etc.)
6" fan blowing across plants
Is the grow substrate constantly wet or moist?
No
What water are you using?
RO (walmart drinking water in 1g jugs)
If using RO,Distilled,mineral water, what is the ppm/EC/TDS without any additives?
5ppm
Are plant's infected with pest's?
No, killed maybe 5 gnats over the last month


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OfflineGoonerHeClips
Stranger

Registered: 08/24/14
Posts: 378
Last seen: 27 days, 23 hours
Re: Yellowing leaves... Possible Nitrogen N or Magnesium Mg Deficiency??? [Re: pornstache]
    #750981 - 10/04/14 11:52 AM (2 years, 1 month ago)

Fox Farm Big Bloom not for veg.  Cal-Mag has some nitrogen.  3 ml/gallon.  Also add 1/2 tsp epsom salts well mixed into water.  pH 6 runoff seems too low in soil.  Your containers are ridiculously small.  1/2 gallon?  Get some minimum 1 gallon containers.  Forget perlite it's crap and 1/3 of your mix?  Use just FFOF why mix in perlite?  When you transplant you need to make the hole the exact size needed using your pot that it is in to actually make the hole.  Enlarge it just a smidge.  Gently put the plant into the new hole and sprinkle dirt to fill the small gap.  Basic stuff yet most don't even know how to transplant without "shock".  Keep your pH around 6.5 in soil and don't overwater.  Steady eddy it.  The Cali-Magic whips the socks off of Cal-Mag it's lower in N and higher in Cal and Mg.  Throw in 1 tsp molasses along with your 3 ml Cal-Mag with no other ferts and see what happens.


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InvisibleCrushNazT
Male


Registered: 07/23/13
Posts: 927
Loc: Colorado Flag
Re: Yellowing leaves... Possible Nitrogen N or Magnesium Mg Deficiency??? [Re: GoonerHeClips]
    #751021 - 10/04/14 04:14 PM (2 years, 1 month ago)

how long have you been growing, gooner???

i'm pretty sure FF's big bloom is for use throughout veg and flower. i may be mistaken, but i think it says on the bottle and feed chart to use it through veg and flower.

and there is ZERO reason to add epsom salt to your solution if you're using cal-mag...

why mix in perlite to FFOF? because FFOF retains a lot of water just by itself. i've used FFOF for years, switched to roots organic, but i'll be switching back to FFOF AND i plan on adding a little perlite to help with drainage/aeration.

and pH 6.5 is a bit higher than i'd personally recommend.


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OfflineGoonerHeClips
Stranger

Registered: 08/24/14
Posts: 378
Last seen: 27 days, 23 hours
Re: Yellowing leaves... Possible Nitrogen N or Magnesium Mg Deficiency??? [Re: CrushNazT]
    #751043 - 10/04/14 07:04 PM (2 years, 1 month ago)

Quote:

CrushNazT said:
how long have you been growing, gooner???

i'm pretty sure FF's big bloom is for use throughout veg and flower. i may be mistaken, but i think it says on the bottle and feed chart to use it through veg and flower.

and there is ZERO reason to add epsom salt to your solution if you're using cal-mag...

why mix in perlite to FFOF? because FFOF retains a lot of water just by itself. i've used FFOF for years, switched to roots organic, but i'll be switching back to FFOF AND i plan on adding a little perlite to help with drainage/aeration.

and pH 6.5 is a bit higher than i'd personally recommend.




So, you think FF Big Bloom by itself with RO water during veg was a good idea?  Apparently not.  It's a micronutrient product.

A pH of 6.5 is fine in soil.  Who made you the expert on such things anyway?

The epsom salts add sulfur which he may be lacking, in addition to Mg.

Roots Organic?  LOL.  Yeah tell us more about your expertise.  Got Gnats?


Edited by GoonerHeClips (10/04/14 07:11 PM)


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Invisiblemhbound
Ballin out at all cost
Male User Gallery Arcade Champion: Pingu Slap


Registered: 09/22/08
Posts: 8,142
Loc: High Flag
Re: Yellowing leaves... Possible Nitrogen N or Magnesium Mg Deficiency??? [Re: GoonerHeClips]
    #751280 - 10/06/14 07:33 AM (2 years, 1 month ago)

Nitrogen if you ask me. Possibly some Mg also but I would get the nitrogen in them, flush, and see what they look like before trying to fix anything else.

If you can/want, flush and then tweak the nitrogen is what I would do just to be sure you aren't getting nutrient lockout because of any salt buildup(doesn't come to mind for me but I am not there with the plants either, better safe).

Do you know the pH of your soil? Did I miss that? Has your growth of your plants slowed?

You used double strength on your one plant that showed signs of burn. You don't necessarily need to double it, it may only need a drop or two more.


--------------------
Suck my balls America


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InvisibleCrushNazT
Male


Registered: 07/23/13
Posts: 927
Loc: Colorado Flag
Re: Yellowing leaves... Possible Nitrogen N or Magnesium Mg Deficiency??? [Re: GoonerHeClips]
    #751392 - 10/06/14 10:26 PM (2 years, 1 month ago)

Quote:

GoonerHeClips said:
Quote:

CrushNazT said:
how long have you been growing, gooner???

i'm pretty sure FF's big bloom is for use throughout veg and flower. i may be mistaken, but i think it says on the bottle and feed chart to use it through veg and flower.

and there is ZERO reason to add epsom salt to your solution if you're using cal-mag...

why mix in perlite to FFOF? because FFOF retains a lot of water just by itself. i've used FFOF for years, switched to roots organic, but i'll be switching back to FFOF AND i plan on adding a little perlite to help with drainage/aeration.

and pH 6.5 is a bit higher than i'd personally recommend.




So, you think FF Big Bloom by itself with RO water during veg was a good idea?  Apparently not.  It's a micronutrient product.

A pH of 6.5 is fine in soil.  Who made you the expert on such things anyway?

The epsom salts add sulfur which he may be lacking, in addition to Mg.

Roots Organic?  LOL.  Yeah tell us more about your expertise.  Got Gnats?




i could be a dick here, but i won't.


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Offlinebudgrowerwannabe
Bum fighter
Male User Gallery


Registered: 01/28/12
Posts: 3,174
Last seen: 15 days, 15 hours
Re: Yellowing leaves... Possible Nitrogen N or Magnesium Mg Deficiency??? [Re: CrushNazT]
    #751428 - 10/07/14 08:25 AM (2 years, 1 month ago)

Dol it lol


:beatingtodeath:


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