Sick ass grow...wtf is going on?! :) trainwreck

The tops are turning white on one of my babies...the tips of the nugs a quarter inch in diameter white bright tip damage right on top!! is this good bad...no other plants have this symptom and this one is farthest away from ac and fans...i wonder if it is burning?


15 gal pots, 2.5 weeks into flowering, 4000 hps watts, 1k watt lights, 1500 tanked ppm, ac/dehumidifier, 2 osc fans...72-74 degrees temp/50-60 humdity...5-10 cooler at night...never under watered...and feeding lots last itme i checks ph run off it was 7.1 and been feeding with 6.0 recently...what you think?

Nobody can help this guy out....?

its in a "hot spot". . the light is bleaching the chlorophil from plant in that area cause the bulb creates a magnified "spot"

whats the solutions? another fan right under light...? this is also the only spot in my room with no diect airflow under light..is this a bad thing, will it effect my nugs, or can i fix this?

take the light up a little bit..

they area a foot away with a 8" maxfan per 2 hoods, strait thru ducting...theres ac or fans by ever plant but this one...think a foot with fans is to close?

A foot away with fans must be too close, if theyre getting bleached from the light.

just making sureits not a nutireint, or co2 related problem! If we are all sure this is light bleach I am very, very happy! Any other tips guys?

if you seeing other leaves near the top losing "green" and turning yellow or curling up like a taco, you need to raise the lights. ive had this a lot of times. its not a big deal. just a hot spot for the lamp. there is a product for this very reason. the super spreader or the equalizer.

nice plants., also raise your temp to 85 or higher so your co2 will work.

doniawon said:

if you seeing other leaves near the top losing "green" and turning yellow or curling up like a taco, you need to raise the lights. ive had this a lot of times. its not a big deal. just a hot spot for the lamp. there is a product for this very reason. the super spreader or the equalizer.

nice plants., also raise your temp to 85 or higher so your co2 will work.

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Show me a source which you can proove this 85 thing, this is complete utter bullshit and make no sense to me

Response to Higher Levels of CO2

Photosynthesis consists of chemical reactions. Chemical reactions procede at a higher rate at higher temperatures. The rule of thumb is that there is a doubling of the reaction rate for every 10°F rise in temperature. Plants grow faster at a higher temperature providing they have adequate levels of CO2, water, sunlight and plant nutrients. The C4 plants have a great response rate for a higher temperature than does the C3 plants.
A higher temperature without adequate level of the necessary ingredients for growth might produce no response or even damage. Sylvan Wittwer, quoted above, states that under most circumstances the availability of CO2 is the factor which limits growth. Thus with a higher level of CO2 in the air plants can grow faster with a higher temperature.
Plants transpire water vapor to keep an even temperature. There are tiny holes on the underside of plant leaves, called somata, which are the openings through which the plant absorbs CO2. With higher level of CO2 concentration in the air the somata do not have to be open as wide. The narrower opening means that less water is transpired and thus less water is required by the plants. In other words, higher levels of CO2 increase the efficiency of water use by plants. This was confirmed in experiments reported by K.E. Idso and S.B. Idso. They found that enhanced CO2 increased growth by 31 percent in plants with adequate moisture but it increase growth by 62 percent for plants in moisture-stressed condition. In effect, enhanced CO2 by reducing water loss created the same effect as providing more water. Thus the effect in moisture-stressed plants was the effects of enhanced CO2 plus the effect of increased water.
The effect of increased CO2 in narrowing the stomata of plants has the additional benefit that a lesser amount of pollutants in the air will make it through the narrower openings. Thus enhanced CO2 has the effect of protecting plants against damage from air pollutants such as ozone or sulfur dioxide.
The effect of enhanced CO2 is even greater for plants grown under low light conditions. The enhance growth is greater than 100 percent for a 100 percent increase in CO2. This compares to less than 50 percent for plants grown in normal light conditions. The evidence that clinches the argument is that some greenhouse owner. and all that money you spent, on gas co2 monitoring tank regulator, has been for nothing. ouch.

Welcome to RIU, can i get some + reps

Wow, what a mess. You dont grow or know much about mary..all plants are different, and even different types have different genetics which require different things to thrive, not to mention where they originate from and what they are trained to do so far in there lifes. All maryj plants are different, the most important thing about growin good pot is the energy level your spirit evokes..a retard with a million dollar grow with no spirit couldnt sprout a dank maryj plant worth smoking. I qoute u "Plants grow faster at a higher temperature providing they have adequate levels of CO2, water, sunlight and plant nutrients." Really, what kind of plants? If maryj does, what strains are you referring to? So if its 200 degrees, and I have enough c02, water light and nutes my plant will grow faster? To clear this up, and earn your rep points, Ill begin with stomata close with more co2, more heat, and less humidity, and dry roots, stomata open when there is more light(PAR), less co2, and high humidity...This is because plants stomata are used as protection and will open or close to protect plant, or to help it survive...think about it, less co2, I better open up so I can accept more...anyways stomata take in co2, water vapor and oxygen, a well as push out water vapor, toxins and oxygen..all through the same opening simultaneously. Its hard to do all these thigns out of one hole, especailly if we make it smaller! When the plant cant do these things, its not happy. Therefore increasing temps above 85-90 with maryj makes co2 useless other than to close stomata even more to keep the plant from burning longer due to the higher temps. one could grow in higher temps with co2 persay, but not a good thing! A better statement would be heat can help speed metablism. Pretty much everything speeds metablism.. none of those percentages mean anything other than the number value and the percent sign next to it..they make no sense and dont add up at all in logic..Rasing ppm from 300ppm to 600ppm, a 100% increase wont do much alone, or with everything backing it! try 500-1000% but only if you can control heat, humidity, co2, airflow, nutes, oxygen and water and space and less potentcy. keep those stomata as open as possible and those temps as low as possible because another fact is that THC level drop as temps increase. co2 intake increase as stomata open larger..air pollutants clog stomata..sulfer is used to protect plant against mold an mildew during veg or early flowering and is also a marjor ingredient for her..lol why would you want to raise temps and co2..so the plants can get clogged or so they cant use as much sulfer? Anyways, thanks for the welcoming to RIU, and Il take those reps ?!

alright man, here is why you should have it on 85. at this temperature, the stomata in the leave are fully open. when you start to go higher or lower than this, the stomata start to close and get smaller. this happens for obvious reasons, when it gets hotter, it closes to slower transpiration.

at 85 degrees you dont have as much, or as potent marijuana, facts maybe facts, but when you mix other facts together the outcomes change. Even if it did allow more co2 in, the goal here is potency and yield and taste, not how much co2 or how high you can get your temps...or even finding the perfect ratio for anything, its a balancing act, and things may increase, but other will decrease, finding the medium is a different place for everyone which is why opinios vary, but 85 is to hot. I also disagree that they would be fully open at 85! It would depend on every other factor in the eniornment to say this truthfully with many calculations and a very powerful microscope!

this is not an opinion. im a botany major, and this is a fact. the stomata open are fully open at 85 deg what evidence do you have that 85 develops less potent and not as tasty bud. you would get any change in taste and the potency loss, if any, would be minimal and compared to the increased yield you would get.

Here's some more info on stomata and temperature that I found, though I can't vouch for its accuracy since I don't know much about this subject, but maybe it means more to you guys.

"When considering how CO 2 uptake is effected by temperature, a brief examination of the leaf structure is necessary. CO 2 is taken in through millions of microscopic openings located on the undersides of the leaves known as stomata. It is here that carbon dioxide is absorbed by the plant and taken within the interior of the plant in order to be combined with chloroplast and water to form Adenosine Triphosphate (ATP) the major source of usable chemical energy in metabolism. ATP is a compound that can be transported and broken down to be used for energy needed for development.

In respect to the stomata humidity and temperature ranges are of great consequence, but it is the latter that is of a primary concern. Just, as it can speed up the metabolic rate in animals, so too can it affect plants. Air temperatures within the range of 65-80º Fahrenheit are usually good parameters to seek within an indoor garden. The upper daytime limit can be raised to 85ºF or more when CO 2 is supplemented. In fact, the processing of CO 2 is directly affected by temperature. Some experiments have shown a rise of 20-30ºF can increase the rate of photosynthesis dramatically by increasing the speed at which carbon is taken from the CO 2 , thus increasing the amount of energy available. Of course this relationship is not infinite! A limit is reached, not too far above the 90º F mark. Once core leaf temperature rises to this point, the stomata will close in order to curtail excessive transpiration. This effectively starves the plant of CO 2 consequentially having a disastrous effect on yield.


Temperature in many respects can be seen as linchpin. If kept within range, transpiration will occur keeping stomata open, which will allow the plant to absorb the much needed CO 2 ."

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ElectricPineapple said:

this is not an opinion. im a botany major, and this is a fact. the stomata open are fully open at 85 deg what evidence do you have that 85 develops less potent and not as tasty bud. you would get any change in taste and the potency loss, if any, would be minimal and compared to the increased yield you would get.

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you dont study maryj in botany, nor does that mean you know how to pruduce a dank plant. THC degrades at temps greater than 70, also high humidity tells bud that its wet and not to produce resin to keep it cool, and moist. Yield means nothing if its not dank..there are many things that make a plant grow and like i stated temps increase metabs which make plant grow faster and break things down to more green and sugars faster, but green is not what I want to smoke son, green doesnt taste good neither do meaningless sugars missing all thc, cbn and cannabanoids and physchoactives..co2 is used to speed things up, I will turn it off last few weeks when plant needs it most and when it is bulkin so the flavor and potency isnt effect as much..anyways, co2 may even make more sugars or crystals or more yield, but is mainly used to have it when yuo dont or liek i said speed and yield..do you like smoking dank? you must not be from oregon! are those crystals as big or as potent as ones with other conditions..no, and doess it make pot danker..no, makes it weaker so keep in mind what it is for and why it is used, not your botany shit which means nothing to maryj or me when it comes to co2 so far

alright man, this is how botany and in that fact anatomy and physiology. Every plant, including all species or anything that has leaves, has all of the basic cellular components that all the plants have. some have more some have less. this is not important. the important part is all plant cells have nucleus', as well as all leaves in plants contain chlorophyll, yes? do you agree with this simple fact? ok this also applies to stomata and how the stomata work. all plants with leaves, have abundant stomata on the leaves. the stomata are the pores of leaves. just like we have pores in our skin to regulate temperature, transpiration in our own bodies, the plants use their stomata to do the same. regulate gas exchange, temperature, transpiration rates. i will agree with you that some of the things i learn in my major will not apply to MJ but the majority of it will. whether you think this or not, to each his own. plants, at the macro level, are very basic and just about all run the same. when you get down to the micro level, the chemistry involved in some of the processes can get quite complex. unless you have extensive chemistry and biology/botany experience and knowledge.

whether you want to take this knowledge and use it to your advantage, which this is knowledge that i payed out the ass for, then that is your lost. but dont go on here, trying to pass your opinion off as facts when its not. i dont ever post anything unless i know what i am talking about.

good day to you

pine