Please help, first time grower! I think my plants have Iron deficiency / Nutrient lockout

elementhc · Jan 16, 2022

twentyeight.threefive said:
Follow the directions for mixing. At most I'd used 3/4 of the recommended amount to start. Might be best to start with 1/2 the recommended amount.

Yes I was thinking 1/2 dose first week. I'm at day 30 now so I'll probably only have a a week or two tops left in veg.

simpleleaf · Jan 16, 2022

elementhc said:
Please see below:

Hello,
First time grower here, running into an issue with what i have come to a conclusion is a Iron deficiency probably due to high ph. I made a cal mag foliar spray, but kinda need some guidance as to what steps to take to fix this problem.

Any help with this or advice would be greatly appreciated there is so much info out there it gets kinda overwhelming for someone that hasn’t grown anything.
Please see below for grow info:

All six are autoflower plants and are on day 28 when this pic was taken.

x2 Girl Scout Cookies

x2 Bruce Banner

x2 Gorilla Glue

Grow info

5x5 Mars Hydro Tent

Light Ts3000
22" from plant tops at 100%
ppfd 500-600 dli 45-55
Running 24/7

5 gallon fabric pots

Medium: 70% coco coir / 30% perilite. I also added about 15% ewc and the following dry amendments 3tb per gallon of 4-4-4 and 1tb per gallon 3-9-4.
Medium PH 6.8
I have not fed the plants any nuts at all other then what I premixed in medium. I have given them a aerated tea with bat guano(7-3-1), worm castings, molasses, alfalfa meal and kelp meal at 10 days and have another one ready for day 21.

Water: Tap water aerated for 24 hours and Ph 6.3 water temp 67f.
Last watering on Jan 14th was at 6.0 ph and it was the first time I watered with around 15% run off.
Run off Ph was 5.8

Climate control Air Infiniti with 6" carbon filter
Temp 74f RH 64% VPD .9kpa
I have two fans going.

I just found out about VPD a week ago and corrected it with a humidifier up until last week my VPD was at 1.6kpa which I think is way to high from what I’m reading on the charts.

I’m here to learn and not afraid of criticism.
Thanks in advance.

I agree the plants look like iron deficiency. I'm confused about your pH, keep it around 6.0, that will make any existing iron more available. I'm not a coco grower, but I'm sure I've read you want to use hydroponic nutrients with it. Your NPKs added as dry to the medium suggests they don't include minors and micro nutrients, so that would also explain iron-deficiency symptoms. I'd look for a complete, easy to use nutrient line made specifically for coco. I wouldn't add any more dry nutrients.

elementhc · Jan 16, 2022

simpleleaf said:
I agree the plants look like iron deficiency. I'm confused about your pH, keep it around 6.0, that will make any existing iron more available. I'm not a coco grower, but I'm sure I've read you want to use hydroponic nutrients with it. Your NPKs added as dry to the medium suggests they don't include minors and micro nutrients, so that would also explain iron-deficiency symptoms. I'd look for a complete, easy to use nutrient line made specifically for coco. I wouldn't add any more dry nutrients.

I am done with dry amendments, just went to the hydro store and got this I'm hoping I canake the switch and save my plants. I also got their liquid karma and silica. Gonna wait another day till my medium is just a bit more dry and feed these at ph 6.0. My tap water is about 180 ppm I'll do half dose first week and start measuring run off. Question would be do I keep adding water/nuts until I achieve run off?

Wattzzup · Jan 16, 2022

A feeding means giving them enough for runoff yes.

Week4@inCharge · Jan 16, 2022

Week4@inCharge said:
For soil. You have Coco Coir

lol... yup, sure does.. right on, you should be good then. Good luck with the grow, keep us posted, you got a nice group there.

elementhc · Jan 16, 2022

Week4@inCharge said:
lol... yup, sure does.. right on, you should be good then. Good luck with the grow, keep us posted, you got a nice group there.

Thank you for taking time to educate a noob!!

Masterdank420 · Jan 16, 2022

elementhc said:
I am done with dry amendments, just went to the hydro store and got this I'm hoping I canake the switch and save my plants. I also got their liquid karma and silica. Gonna wait another day till my medium is just a bit more dry and feed these at ph 6.0. My tap water is about 180 ppm I'll do half dose first week and start measuring run off. Question would be do I keep adding water/nuts until I achieve run off?

Yes water until runoff.

elementhc · Jan 17, 2022

Update: I feed the plants with the PBP for the first time today here is the info I have:
Going in:
Water Ph 6.0
Water ppm before nutrients 110 ppm
Water ppm after nutrients 500 ppm

Runoff
Runoff Ph 5.8
Runoff ppm 2400

Not sure if you guys can tell anything from this info but shouldn't the Runoff ppm be closer to ppm going in?

myke · Jan 17, 2022

elementhc said:
Update: I feed the plants with the PBP for the first time today here is the info I have:
Going in:
Water Ph 6.0
Water ppm before nutrients 110 ppm
Water ppm after nutrients 500 ppm

Runoff
Runoff Ph 5.8
Runoff ppm 2400

Not sure if you guys can tell anything from this info but shouldn't the Runoff ppm be closer to ppm going in?

Its from the original fertilizer you put in,kinda tricky as it wont just flush out as said already.

elementhc · Jan 17, 2022

myke said:
Its from the original fertilizer you put in,kinda tricky as it wont just flush out as said already.

Yes I figured it would be all screwed up from the dry amendments.

twentyeight.threefive · Jan 17, 2022

elementhc said:
Update: I feed the plants with the PBP for the first time today here is the info I have:
Going in:
Water Ph 6.0
Water ppm before nutrients 110 ppm
Water ppm after nutrients 500 ppm

Runoff
Runoff Ph 5.8
Runoff ppm 2400

Not sure if you guys can tell anything from this info but shouldn't the Runoff ppm be closer to ppm going in?

Just continue on and ignore the runoff numbers.

elementhc · Jan 17, 2022

Will do thanks again everyone hopefully I can salvage something out of this if nothing else experience.

myke · Jan 17, 2022

elementhc said:
Will do thanks again everyone hopefully I can salvage something out of this if nothing else experience.

The N is water soluble in gaia 444 so maybe just use a little less of your N part.Maybe it flushes out not sure,just keep an eye on.

calvin.m16 · Jan 17, 2022

elementhc said:
Update: I feed the plants with the PBP for the first time today here is the info I have:
Going in:
Water Ph 6.0
Water ppm before nutrients 110 ppm
Water ppm after nutrients 500 ppm

Runoff
Runoff Ph 5.8
Runoff ppm 2400

Not sure if you guys can tell anything from this info but shouldn't the Runoff ppm be closer to ppm going in?

Reading runoff doesn't give you an accurate depiction of what's going on unless you're in pure hydro. In Soil/Soilless your rootzone itself or actual soil will tell you a way different story than the run off.

To Prepare the water-soil mixture.
a. Place 50 g of Soil into a Beaker.
b. Add 100 mL of distilled water to the beaker.
c. Stir the mixture thoroughly.
d. Stir once every three minutes for 15 minutes.
e. After the final stirring, let the mixtures settle for about five minutes. This allows the soil to settle out, leaving a layer of water on top for you to take your measurement.

How do I prepare a soil slurry? - Technical Information Library

To Prepare the water-soil mixture. a. Place 50 g of Soil into a Beaker. b. Add 100 mL of distilled water to the beaker. c....

www.vernier.com

If you want to micro manage the plants EC(PPM)/PH you should look into investing in a Bluelab Pulse meter that you can stab into the roots and it will tell you the EC (PPM), Temperature & moisture content. Otherwise, look into

elementhc · Jan 17, 2022

Should I be measuring the Ph of my coco with a soil ph meter? If so what's the ideal ph 6.0?

twentyeight.threefive · Jan 17, 2022

elementhc said:
Should I be measuring the Ph of my coco with a soil ph meter? If so what's the ideal ph 6.0?

Measure what goes in for your feed. Don't worry a out medium pH or runoff stats.

Week4@inCharge · Jan 17, 2022

elementhc said:
Should I be measuring the Ph of my coco with a soil ph meter? If so what's the ideal ph 6.0?

With soil that would be idea, but Coco, all you'd have to do if the pH is off is flush it till it's right. Your not gonna see any magic over night, and damage done is damage done, once yellow always yellow, just check the new growth for color.

twentyeight.threefive · Jan 17, 2022

Week4@inCharge said:
With soil that would be idea, but Coco, all you'd have to do if the pH is off is flush it till it's right. Your not gonna see any magic over night, and damage done is damage done, once yellow always yellow, just check the new growth for color.

You might want to reconsider giving out coco advice.

Week4@inCharge · Jan 17, 2022

twentyeight.threefive said:
You might want to reconsider giving out coco advice.

you check the Coco pH with pen?

twentyeight.threefive · Jan 17, 2022

Week4@inCharge said:
you check the Coco pH with pen?

How many times have you grown in coco?

Please help, first time grower! I think my plants have Iron deficiency / Nutrient lockout

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