Help much appreciated.

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Mannheim

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Well, lets see. First time grower. Starting from seeds, successfully germed 97/103 seeds, so the seeds we're viable, was worried about that. Mixed black gold potting soil 1 part to promix 2 parts. Dixie cups with ziploc bags then into humidity domes. All grew well for the first couple weeks, took them out of the domes, transplaned into 4" Containers, same soil mix but with 2" or peagravel in the bottom. Average room temps are 80 during the day, 75 at might. Humidity staying between 50-70 at this stage. Lighting is 18/6. Plants are growing under T8 bulbs, Approx 2200 lumens/sf, full spectrum with a few grow light types in there too. Did not check PH for the full first month and a half of this grow, didn't know it was important. :( Big mistake I think. Anyways, moving on, 2 months in, transplanted into 6" containers, lost about 30 of initial plants by this stage but I started with 100 and only have room for about 18-22 full size plants so this was ok and expected. 2 months in...started noticing the bottom leaves turning yellow and dying on all the plants. I'd studied enough to know that this was most likely N deficiency, and also that it was probably brought about by a PH problem. I read this post where a guys said to a new grower "If you wanna get frisky...start by playing with your PH first." I took that to heart. I have well water, really good well water. I tested it with a 4-way probe (piece of ****) and it really didn't tell me much. Bought another probe, PH only, started testing my water cause it seemed a whole lot easier than testing my soil, water came in at about 7.2. I'd read that about 6.4 was perfect for soil so I went out and bought a jug of PH down, figured I'd treat the water to 6.4 and eventually the soil would land there too. Thus began my nightmare of playing with the PH... I think the first time around I got it right because after a couple weeks the yellowing of the leaves went away, but as time went on, I couldn't seem to get the PH in the water right, it either took too long to change or I kept overshooting my mark, or it would test good then by the time I was done watering it would be down to 5.0...all kinds of stuff. So I went out and bought 2 digital PH meters to test them against themselves, probe style meters, and ***...those 2 rarely ever came in the same, usually about .6 away from each other, along with the 3rd analog style being different also. So, I went out and bought a capsul/color chart testing kit. Now I'm up to 5 freaking PH testing gadgets, still trying to get it right, all the while my damn plants are getting worse. 90 days in, or around there I transplant into 10" Containers and begin the 12/12. 2 weeks later, about now..I've got 31 confirmed females, average height is 24-30". 1/3 of them are in the promix/black gold soil and 2/3 are in Sunshine #4 with aggregate. All have 2" of peagravel in the bottom. I don't have any pest problems that I know of, I wait for the top to get crusty before I water them. All the roots looked great 2 weeks ago when I transplanted. My Capsul/Color gauge said with the untreated water and the sunshine #4 i had a PH of 6.5, so I just went with it. At this point I was ready to roll up shop, ARRG. Anyways, as far as nutes go, I knew there was some in the soil, didn't know how much, and basically got the feeling from the forums that less can be more which made sense so I did 2 different feedings with miracle gro (nitrogen strong blend) at 1/2 strength, earlier on, about 2 weeks apart. I haven't give them any additional nutes for like a month and a half because I'm worried about over fertilizing and I don't have my PH right. Please please help me out here, any and all suggestions. I just took these pics this morning...these plants have looked like this for a couple weeks....and it seems to be getting worse, slowly though. Any help?

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Holy crap that was a lot to read....:) From looking at your pics I see a cpl possible problems.

You look under lit....that is most likely why your plants are tall and lanky looking. You want 3000 lumens a sqr foot in veg and 5000 lumens a sqr foot in flower....those are the min requirements.

I see some "Rams Horns" on your plants as well....this is usually from over feeding.

Also see that you indeed did/do hve ph problems.

I wld read through as much of this as you can and then ask questions on what you don't get...>>>http://www.marijuanapassion.com/forum/showthread.php?t=9396

Welcome to MP....
 
Will do. Thank you so much for the reply.

I've got Ed's Marijuana growing textbook, read it front to back, of course several issue's of HT, along with hours of online forum browsing. One thing I'm not finding enough info on is the BEST way to test soil PH (obviously not a probe, or I've got 4 haywire ones) and then the best way to raise or lower the ph in a soil container grow. If I could latch onto good information on those 2 points, it would be a great start, something I could go out and do right now. I don't care if I've got to spend a chunk of change on a good meter, tell me which is the best, I'll buy it. I know the PH is where I need to start..unless I'm wrong :) About the lights, well, yeah...it's not optimal, and they stretched alot more since I put them into the 12/12, early on they looked real good. Last 4 waterings were nute free pure water flushes, so I'm hoping this possible overfeeding will go away.
 
Mannheim said:
Will do. Thank you so much for the reply.

I've got Ed's Marijuana growing textbook, read it front to back, of course several issue's of HT, along with hours of online forum browsing. One thing I'm not finding enough info on is the BEST way to test soil PH (obviously not a probe, or I've got 4 haywire ones) and then the best way to raise or lower the ph in a soil container grow. If I could latch onto good information on those 2 points, it would be a great start, something I could go out and do right now. I don't care if I've got to spend a chunk of change on a good meter, tell me which is the best, I'll buy it. I know the PH is where I need to start..unless I'm wrong :) About the lights, well, yeah...it's not optimal, and they stretched alot more since I put them into the 12/12, early on they looked real good. Last 4 waterings were nute free pure water flushes, so I'm hoping this possible overfeeding will go away.


I hve tested the ph of my soil ZERO times.....here is why:

I start with a nice neutral soil with no added time release nutrients in it( Miracle Grow Seed Starter) to it I add a lil extra perlite for drainage and some sweet lime to help keep the ph in line. Then I have a simple rule....nothing goes into my soil unless it has been ph'd to 6.5. .....I recal my meters every other week and things cruise along smoothly.

I buy my meters at Eseasongear.com....jmo
 
Rather than worry about spending money on ANOTHER pH meter, think about upgrading your lighting first. If you have pH 7.4 water, you should be pretty good with the soil you are using as far as pH goes (assuming). Ditch the MG and find some nutes for MJ. Theres plenty out there. Fox farms, etc. I prefer organics in soil and chems in hydro. I run both because I like to stay busy. consider checking out the organic threads and looking into organic super soil SS mixes. Then you never really have to worry about pH. Just add water and watch them grow.
 
Hamster Lewis said:
I hve tested the ph of my soil ZERO times.....here is why:

I start with a nice neutral soil with no added time release nutrients in it( Miracle Grow Seed Starter) to it I add a lil extra perlite for drainage and some sweet lime to help keep the ph in line. Then I have a simple rule....nothing goes into my soil unless it has been ph'd to 6.5. .....I recal my meters every other week and things cruise along smoothly.

I buy my meters at Eseasongear.com....jmo
Im curious Hammy... Do you actually have to pH your water? Or does the addition of GH nutes bring it down to where you like it?
 
the plants look under-lit like Hamster said. you often can mess up a crop like this simply from chasing the pH too much. for years i grew successfully without ever checking or knowing about pH. plants can adapt to all manner of weird environments - but only if they are stable anc consistent.

if it were me i'd pH correct plain water to about 6.5-7.0 and leech/flush all the containers, then put away all the pH meters and ignore them. it will take 1-2 weeks for the plants to stabilize but might be worth it.

your return from those plants will be in the 10%-20% of what they could have been.
 
akhockey said:
Im curious Hammy... Do you actually have to pH your water? Or does the addition of GH nutes bring it down to where you like it?

I ph my water for straight watering...out of the tap lately it is 7.8. Way too high. And my feed which is GH Flora 3 part has to be ph'd as well because I am in soil....the GH 3 part buffers the water ph down to 5.8-5.9 which is too low for soil but good for hydro.
 
So, I'm getting some water PH test kits this evening. I transplanted them all into 10" pots 6 days ago, gave them a complete watering at the time also. The soil is still moist to the touch and the plants are sill heavy so I'm still waiting to water them. Now when I water them, if they are looking like they already are suffering from overfeeding, I probably shouldn't add anymore fertilizer eh? But please keep in mind I' haven't fertilized them for about 45 days, so.....? Also, if they are looking like they are overfed and I dial the PH in right, won't that release even more nutes therefore exacerbating the problem? When I do water here in a day or so I'm going to pretest the water and get it to 6.4, then water or add say 1/2 str nutes and water? Anyone?
 
Since Ph isthe subject of the day i re-posted these from elsewhere on this site.:) oh, and ph your final solution, not check ph then add stuff:) :)

Nutrient_Chart.gif


Nutrient_Uptake_and_pH.jpg
 
That looks like old damage as far as the over feeding goes....I always have some battle scars on my girls by the time I get them through flower. As long as new growth looks good I don't worry about old damage. Especially down low on the plant...those leaves always get funky. If you have not fed them in 45 days I wld think they might need to eat. This isn't amended soil is it?
 
It's sunshine mix #4 w/aggregate, and I can't find on the damn bag whether it is or it isn't. I know the promix has some goodies in it along with the Black Gold potting soil. To be honest I didn't think the soil had alot of particulars in the beginning...boy is there alot to learn. I just bought the good stuff and figured I'd be good to go.

Back to the PH...after nutes are added if I dial the water down to a 6.4ph will the soil eventually follow suit?
 

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