N Def?

[topwater]

I have four Northern Lights I started from seeds planted on Oct.21. I transplanted them on Nov.23 into 1/2 gallon pots. They are in 2 parts pro-mix, 1 part perlite and 1 part worm castings. I am using GH flora nutes. I just fed them 3-2-1(tsp. per gallon) last night. I was feeding 1-1-1. I feed every other watering about every two days. I use distilled water @ 6.5 ph. Temps are mid 70's. Oh yeah, I added a little dolomite to the soil mix also. I have them on 24hrs light right now, but want to make the switch soon. They are about 18" tall and are starting their pre flowers. Fan on constantly. I plan to transplant one more time into 3 gallon pots then 12/12.( if I get this taken care of) I haven't tested the runoff yet.
Here are some pics of the worst one:







What's odd is, I have one plant that is really healthy and green. Hardly any discoloration at all even though it is in identical soil etc.
Any ideas and cures?
Thanks,
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[Wiimote]

That is not a N def, thats a mag def. Add 1 tsp of Epsom Salts to a gal of water and use that to water your girls.

 

[MynameStitch]

Transplant that plant into a bigger pot immediately, it does have a magnesium, but the issue that is going on in the upper part of the plant is NOT a magnesium issue; this is a zinc issue..... You are feeding them way to often you are causing a lockout here, you should feed every 5 to 7 days not every 3 and even at that dose......

Combined with your rootbound plant and you feeding every 3 days you aer locking out micronutrients that the plant can't get.

How tall is that plant? With you using distilled water they are getting very little micronutrietns; gh has them in there, but you still need more and with them getting over fed the small amount they were getting is not enough and is locking out the absorbtion of it.

Your pH is also off, your pH should be 5.5 to 6.3 you wil need to bring that down a bit... you are going to have to put some coffee grounds or something else that would make the soil acidic...... PH adjusting water will not help the soil pH... you will have to add stuff to the soil to control the soil's pH, you are using a soiless mixture which is why your pH needs to be different.

So, your plant is rootbound, your over feeding and your pH is off which is leading to your prblems.

You will need to flush your plants out very good with lots of water.... 3 gallons of water.

transplant her into a bigger pot, first need to know how big the plant is first..... 12 in tall plants to 1 gallon size pot MINIMUM!
When you transplant, use promix or some other soil without so much lime, you added too much lime to your mixture and it brought the pH up too high.....

 

[topwater]

Thanks stitch. They are about 18" tall and i was mistaken on the pot size. They are one gallon pots. I will transplant tommorrow. Any old coffee grounds work? and how much?

 

[MynameStitch]

You can use something besides coffee grounds, does not have to be that I was using it as an example.....

sawdust, composted leaves, wood chips, cottonseed meal, leaf mold and peat moss.
Those are others you can use as well, you can buy just plain peat moss. It depends on how much you need to use, since you need to transplant anyways; get a mixture that does not have as much lime in it; some lime is required depending on the kind of peat it is.....

You can add more peat to your promix or use a little bit of coffee grounds, you would have to pH test the coffee grounds before using them so you know how much you need to add to adjust the pH.

You can take a bit of coffee grounds and promix put it in a small pot like a cup or something and water, test the pH and see what you get... that way you will know how much you need to add; if you add too much coffee grounds you will get an acidic ph and then you will need to add a little bit of lime.

 

[topwater]

Thank you very much Stitch. I appreciate the solid advice, wish there were more people around like you.
I do have one more question, if you don't mind. You said transplant and flush? In that order, or would just transplanting suffice? Then water the crap out of it.
I made up some more soil mix tonight and instead of the pro-mix, I am using peat. This was my first time using the pro-mix and I thought adding the perlite and worm castings it would need some more lime. Live and learn, huh.
Last year I had a very successful grow with just the peat, perlite and worm do-do. Guess I'll stick to that.
Thanks again,
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[MynameStitch]

I would flush her first before transplanting her; then put her into new mixture; she is rootbound; so flush her then wait a day or 2 and transplant; do not transplant her right after the flush; the ball will weight too much with all that water you flushed through her.

Promix is pretty much peat based; but you just added too much lime to the mixture and caused the pH to raise up to high; once lime is mixed in with the mixture it's a little harder to bring down the ph than what it would be without it.

Lime can only raise pH, the crap you read about it lowering it.... it would take so much of the lime to lower it; it would not be safe having that much calcium and magnesium; it would be such a complete imbalance it would cause the plant issues having so much of it. So lime is only used as a pH raising imo.