azmmjadvocates
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Most plants (especially those that fruit/bud with a good amount of water weight added) prefer to be at a VPD of about 8-10.
At 65RH and 79 degrees, you are at a VPD of ~12 which is certainly reasonable for the most part--however for an equatorial strain from a place as rainforest-y as Colombia, I'd expect you need to push this into the 8-10 range, and perhaps even beyond it early in veg.
For that particular strain (if it is indeed bred out from a Colombian parent and sensitive to that heritage genetically) an RH between 72-75 is where I'd shoot for at that temp. Maybe even moving up towards 80 in early veg.
Do you see any tacoing/twisting/heat stress along with the spotting? If so then its almost guaranteed to be a humidity issue based on my experience.
At what point is it that those genetics are hardened to new environmental conditions through seed propogation? An example would be the reduction of stomata in high CO2 climates http://phys.org/news/2011-04-araucarias-gauge-ancient-carbon-dioxide.html
What led me here to THC farmer in the first place was following anything fatman wrote, that led me to the Mine forum and reading about Jacks hydro from 2010 post by Yosimitiesam. Take Fatman for instance, was he only working with one strain? I don't look primarily at environment as it relates to genetics, only what happens when all things are not taken into account when manipulating environment. I have a mullen in my back yard here in AZ from up in the mountains taken from 5000 feet, now here at 115 degrees and it's thriving because I hardened it, seeds will be adaptive as well.
What I'm trying to say is I agree with you that his humidity is high for his temps, but I dont focus on the VDP by genetics. I look at manipulating turgor pressure to my advantage by forcing the stomata to stay open, massive H20 uptake and nutes along with it, however that requires adjusting nute concentrations, I don't focus so much on VPN because I keep my RH low and Temps higher. If I didn't do that I'd experience problems. A plant takes some of it's environmental conditions and imprints that to seed, Some factors depend on the breeders IMHO.
Most plants (especially those that fruit/bud with a good amount of water weight added) prefer to be at a VPD of about 8-10.
At 65RH and 79 degrees, you are at a VPD of ~12 which is certainly reasonable for the most part--however for an equatorial strain from a place as rainforest-y as Colombia, I'd expect you need to push this into the 8-10 range, and perhaps even beyond it early in veg.
For that particular strain (if it is indeed bred out from a Colombian parent and sensitive to that heritage genetically) an RH between 72-75 is where I'd shoot for at that temp. Maybe even moving up towards 80 in early veg.
Do you see any tacoing/twisting/heat stress along with the spotting? If so then its almost guaranteed to be a humidity issue based on my experience.
lol, you will probably want to kill me, your math works out correct if it's 27% N, but I come up with .00662 g/gal. I follow your math but are you sure it's 27%? Looking at 25# or 100# the numbers are the same, multiply x 4 and they translate. The example they give of 20-10-20 adding 10.6oz pr 100# is the same as the column below 2.65oz pr 25#.
Looking at the example being a 20-10-20 mix seems pretty straight forward but we use 5-12-26 plus the 15.5 from the Ca(No3)2 so that should equal 20.5% N ? If the way you are figuring this is correct, that would imply we need different concentrations for Veg and Flower?
Opening of stomata can be correlated to VPD in a 1:1 ratio. VPD directly effects the saturation of guard cells with water--which causes stomata to open.
Also the genetic situation you propose above wherein you take a cut from the mountains and get it used to a new environment--this will not have a direct genetic effect. The seeds have a chance to be adaptive (as the parent clearly is)--but the moving of the plant itself has no direct effect on this. It simply follows that the offspring are likely to have some of the traits of the parent (which may include traits which allow vigorous growth at the lower altitude).
Where you keep your plants shouldn't affect the offspring at all--unless there are some meiotic drive elements at work which are environment dependent, but I've never heard of such a thing.
Now you have lol.. IMHO this plant is HIGHLY adaptive, look at all the nute concentrations all the meddling we have done going back thousands of years.
You are absolutely correct about the VDP 1:1 ration I just don't have to run a calculation because I keep my temps high enough and RH low enough for me not to have to give it a consideration.
You're saying backwards of what is actually needed. To maintain VPD at proper levels, as temperature increases so must RH.
For example:
couldn't tell you exactly how much MORE i need to use but depending on my mix say i use 25ml down with city tap.. on the well it takes about double that and that is to move it a few points compared to the city which has a longer ways to get to 5.8 my tanks are 100 and 150gal.. im starting to learn ph down is adding to my nutrient profile? any products i can effectively use for up and down that will not add to the food and be stable?
You're saying backwards of what is actually needed. To maintain VPD at proper levels, as temperature increases so must RH.
For example:
sulfuric acid. it will raise sulfur but will not affect NPK.
thanks Cap. from what i've read sulfur is a good thing...
question for you. The root packs and foliar. If you only had a warm rez how would you suggest using them? running straight canna coco DTW currently on maxi due to hi temps and canna going funky. ordered up some jacks and i'll be making the switch shortly.
in flower im feeding multiple times a day running 1gal pots with good run-off. my veg period is usually 7-10day's.
another thing. i clone in straight coco.. will mixing in some of the roots pack be beneficial?
CAP what alien plant is that in pic? also with jacks what g/watt have you had ?I am running this at around 80% and plants are really loving it. Ill take some pics later to post up here.
CAP what alien plant is that in pic? also with jacks what g/watt have you had ?
have you run that same strain with different nutes,looking for comparison between jacks and other nutes like h&g that alien strain is it a test or are they available now i have a coulpe of his just wonderingI am not at liberty to divulge that info. my best run on jacks was 5 elbows under 3 600w with pK, but I coudl do better if I ran something like the guava13 or tangerine dream (bigger yielders).
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