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Farmers Lab Advanced Theories and Techniques - Got a few grows under your belt and want to discuss more advanced theories and techniques? Discuss these matters here.

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Old 11-14-2013, 03:37 AM   #41 (permalink)
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You have too much clay in your soil- not enough drainage. It's resulting in the roots not getting enough oxygen because of the small soil pores and it's suffocating your plants roots causing metabolic issues.


Humidity doesn't matter with weed so long as there is a proper amount of moisture in the soil.

It appears you have a zinc and iron deficiency, have you checked your soil pH? 6.5 is the sweet spot, your pH is probably a bit high due to the anaerobic soil conditions.

You need to find a phosphorus fertilizer with zinc, this will help the problems you're having.

Last edited by titsup; 11-14-2013 at 03:48 AM.
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Old 11-14-2013, 05:47 AM   #42 (permalink)
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Humidity does indeed matter with weed. If you don't monitor it, and it gets too high, you start getting mouldy buds and bud rot.
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Old 11-14-2013, 03:36 PM   #43 (permalink)
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Well duh, but it's hard to get that high of a humidity unless you're growing in the rain forest..

Also just because you did a pH test, doesn't mean you analyzed it correctly. In your case, your pots appear to be ceramic and I'm guessing only have one hole in the bottom...

The soil conditions in terms of moisture and pH can be completely different at the bottom than the top couple inches.

If you were going to yield higher I would suggest carefully replanting, but you don't have that much anyways so it's not a big deal. The best thing you can do for your anaerobic conditions is to stop watering it and see what happens. Chances are they will be just fine for about a week. Your evapotranspiration rates are pretty low with such small plants and 50% humidty. So dry that soil out as much as you can without wilting the plant too much. It might stress the plant a little until then, but it might be better in the long run than continuing with your currently over saturated soil.
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Old 11-14-2013, 05:35 PM   #44 (permalink)
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No, actually its pretty damn easy lol.

If you water in the heat of the day (leading to increased evaporation), then when the night temps come and everything drops by 20 degrees, all that evaporated water in the air brings large humidity spikes. Add that to natural humidity fluctuations due to local temp. changes and weather events, and you have what's a quite common problem in marijuana grows. We had humidity issues in the texas panhandle, which boasts a typical dew point in the negative degrees Fahrenheit even in winter months.

Do you have any evidence that he read his pH incorrectly? No? So, just spreading doubt for the sake of it or what?

As for your comment: "The soil conditions in terms of moisture and pH can be completely different at the bottom than the top couple inches." Well yeah, obviously lol. that's why you take pH readings from the runoff of the pot, not the dirt near the top. Unless you have on of those dinky soil probe types, but those are generally shit unless you happen to have laboratory quality gear.
As far as moisture.... There is no shit here, Sherlock! You wanna measure the moisture levels in the pot as a whole, not layer by layer. Pick that bad boy up. Get a feel for the heft of the thing both freshly watered and all dried out, and it becomes an easy way to judge if you need to water or no.

Damn it all, where is Farmergiles?
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Old 11-15-2013, 03:42 AM   #45 (permalink)
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PH test is suggesting no issues. other 5 plants are ok with normal height and decent sized leaves. same pot and soil. will try the iron and zinc.

however with this plant will re pot. the growth near nodes appear to be pollen sacks but cannot say because could be new sets of tiny leaves. i need a magnifying glass!
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Old 11-15-2013, 02:01 PM   #46 (permalink)
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No, actually its pretty damn easy lol.

If you water in the heat of the day (leading to increased evaporation), then when the night temps come and everything drops by 20 degrees, all that evaporated water in the air brings large humidity spikes. Add that to natural humidity fluctuations due to local temp. changes and weather events, and you have what's a quite common problem in marijuana grows. We had humidity issues in the texas panhandle, which boasts a typical dew point in the negative degrees Fahrenheit even in winter months.

Do you have any evidence that he read his pH incorrectly? No? So, just spreading doubt for the sake of it or what?

As for your comment: "The soil conditions in terms of moisture and pH can be completely different at the bottom than the top couple inches." Well yeah, obviously lol. that's why you take pH readings from the runoff of the pot, not the dirt near the top. Unless you have on of those dinky soil probe types, but those are generally shit unless you happen to have laboratory quality gear.
As far as moisture.... There is no shit here, Sherlock! You wanna measure the moisture levels in the pot as a whole, not layer by layer. Pick that bad boy up. Get a feel for the heft of the thing both freshly watered and all dried out, and it becomes an easy way to judge if you need to water or no.

Damn it all, where is Farmergiles?
Just so you know, I am an agronomist and soon to be a nationally recognized certified crop adviser for farming.

I study soil and nutrient availability at the oldest agricultural university in the united states. You are overly simplifying my area of expertise.

I am pretty sure I know what I'm talking about. I can do circles around you when it comes to soil and crop science.

Last edited by titsup; 11-15-2013 at 02:08 PM.
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Old 11-15-2013, 02:05 PM   #47 (permalink)
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i got some manure for you to study.
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Old 11-16-2013, 10:20 AM   #48 (permalink)
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Just so you know, I am an agronomist and soon to be a nationally recognized certified crop adviser for farming.

I study soil and nutrient availability at the oldest agricultural university in the united states. You are overly simplifying my area of expertise.

I am pretty sure I know what I'm talking about. I can do circles around you when it comes to soil and crop science.
Ask for your tuition back, your knowledge is lacking in some areas.
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Old 11-17-2013, 07:51 AM   #49 (permalink)
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Since you took it upon yourself to remove your comments, I have nothing further to say also.
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Old 11-17-2013, 08:47 AM   #50 (permalink)
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lol Slunt.

Good luck Ganga! Hope the ladies come out nice.
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Old 11-17-2013, 09:20 AM   #51 (permalink)
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A squid has 1,000 chromosomes... Number of chromosomes means NOTHING. Just like your critical thinking skills. [/B]
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Looks like you have an extra one buddddy
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Old 11-17-2013, 02:43 PM   #52 (permalink)
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Just so you know, I am an agronomist and soon to be a nationally recognized certified crop adviser for farming.

I study soil and nutrient availability at the oldest agricultural university in the united states. You are overly simplifying my area of expertise.

I am pretty sure I know what I'm talking about. I can do circles around you when it comes to soil and crop science.
If you're an agronomist, I'm Doctor Grinspoon.
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Old 11-18-2013, 06:06 AM   #53 (permalink)
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Old 11-18-2013, 11:43 AM   #54 (permalink)
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Sage's posts about marijuana always make me want to get really high. They appeal to the romance/love I have with the plant
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Old 11-18-2013, 01:12 PM   #55 (permalink)
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Old 11-18-2013, 03:26 PM   #56 (permalink)
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Sage's posts about marijuana always make me want to get really high. They appeal to the romance/love I have with the plant
I thank you, Brother.

I appreciate knowing that I pluck the cannabis chords of your heart strings.

But I LoL'd a little at you taking the time to mention so over such a short post,
which is rather unlike me.

Encouraging my minimalism, my Friend!

Cheers to Cheeba!
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Old 11-19-2013, 12:18 AM   #57 (permalink)
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i'm not taking chances with the one in pictures. looks too suspiciously male. so based on the advice above. i have moved it indoors away from the potential ladies. will do bag thing with the lower branch like you guys said.

Will keep you posted. but thanks a lot you guys.
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Old 01-12-2014, 06:04 AM   #58 (permalink)
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Is too late

Hey guys we are now 18 weeks into since germination. Its winter here with temps between 40F to 63F.

Here are photos for you to see if i should harvest. The buds aren't that big. But that is probably because it is either too cold or they are in a pot.

But more importantly should i harvest?

The photos are of durban poison.

Please advise.
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Old 01-12-2014, 06:13 AM   #59 (permalink)
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You may want to wait for some more experienced people to post.. but I believe it is all about trichome color.. got a scope?
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Old 01-12-2014, 10:30 AM   #60 (permalink)
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Depending on the strain, the trichomes will either turn from clear to milky, or clear to amber. Also, the hairs on the buds will go from light green-yellow to that red-orange hue that signals maturity.

If you pull early, it'll be alright but the high will be a bit headier (I think the high is shorter, too) but shit will still do a decent job.
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