HGO vs ICMag

[Fields~of~Green]

yeah looks cold in there look at all that snow on the buds

 

[Bush Dr]

I fucked up this grow with cold night temps.

Did you have a heater in the rez?

Didn't think so .... stick a big fucker in now

 

[dansbuds]

cold water rez or not they look great HGO !!!!

i think by putting my rez's in the flower room this time with covers on them & a heater for lights off right next to them .... i shouldn't need the aquarium heaters this winter . time will tell .

 

[wantaknow]

got a few reveg like that going myself ,glad to your ok !will be popin in good luck

 

[doneit]

uhhh.. cold roots want cause stretch buddy... they would stunt if anything.

Dansbuds has the rite idea there.. radiant sealed heater to keep the environment stable.

if the ambient air stays 76 the rez will be 66-70.. 2cents

 

[Hundred Gram Oz]

I still think your going to pull nicely even with the cold temps bro, quality buds as per usual.

Peace

G81

Thanks Green, must check out your grow. I bookmarked it but never got around to giving it a proper read. I'll head over that direction now.

Looking good mate.

Thanks Demon mate.

greasy!

You know it doneit lol.

Isn't it great when "I fucked up this grow" comes out looking like that

HGO. Get those temps back ta dialed in for next round.

Haha Yeah Mister D the pics don't make it look too bad but trust me it's really fucked me over. The tent has perfect temps and the buds are a very nice size for 34 days flower, bigger than the other room at 48 days. Yep I've got plans to get my temps sorted out for next run for sure. Good to see ya bro.

Did you have a heater in the rez?

Didn't think so .... stick a big fucker in now

Wise words mate, wise words. I had 2 big extractions on full swing day & night (no controller) plus I have a big intake, I fixed it at the end of stretch so that 1 of the filters was on constant and the other would go off when the lights went off and I totally disconnected the intake, that brought the temps around but lately its been getting chilly again with all this rain and cold weather so I've put in an oil heated portable radiator to come on at night for an hour on/hour off cycle until lights on, the temps are at 71F lights out now thankfully.

I was actually considering putting big rez heaters into my reservoirs but to only kick on at night to get the nute temps up then give them a feed of nice warm solution at lights off just like you did during that cold winter but since I've put in the portable heater it seems to be fine...too little too late. The only thing about warming the nutes is that the dissolved oxygen will be lower, the higher the temps the lower the DO content so I was thinking for my next grow that I will put in rez heaters and keep my nute temps at 72F but also put in some air stones for extra DO and also mix the coco with perlite for a better oxygen ratio in the medium.

cold water rez or not they look great HGO !!!!

i think by putting my rez's in the flower room this time with covers on them & a heater for lights off right next to them .... i shouldn't need the aquarium heaters this winter . time will tell .

View Image

Thanks Dan, that's exactly what I'm doing right now lol, just like you have. Night temps are at 71F bit late though lol.

got a few reveg like that going myself ,glad to your ok !will be popin in good luck

Thanks bro.

uhhh.. cold roots want cause stretch buddy... they would stunt if anything.

Dansbuds has the rite idea there.. radiant sealed heater to keep the environment stable.

if the ambient air stays 76 the rez will be 66-70.. 2cents

Yeah bro that's exactly what I'm doing now. Here's a good article about root zone temperature by Canna. I cut the bit about RZT...

Maintaining temperature

The temperature in the top zone has to be right for the chemical reactions to occur. The top zone itself can slow down transpiration or increase it as needed to maintain a certain temperature in the production tissues.
When the lights go on, temperatures are low and there is less need for cooling. As the day progresses, the energy and temperature in the air and plant tissues increase, as does the rate of transpiration, which then falls back again as the day comes to an end. These temperatures can, for example, start at around 18°c and reach a peak of 29°c before falling back, an 11-degree difference over half a day. In the root zone, these temperatures may vary between 18°c and 19°c – only a 1°c difference, but the roots must function well enough in that constant temperature range to provide everything that the top zone needs, and then does not need, as it goes through the rapid daily temperature change.
Using this knowledge

plants took millions of years to evolve to the circumstances in which they had to survive and propagate themselves under natural conditions. Soil temperature and characteristics vary according to latitude and composition. Plants have evolved according to the needs they faced in specific locations. Soil, whether natural or artificial, varies in its ability to lose or retain heat based on material, depth (volume) and moisture level. In very porous material, the temperature will fluctuate rapidly, as it will in dry material. But temperature fluctuations decrease as the material becomes denser or if it contains more moisture, and this is increasingly the case deeper into the soil profile. But soil will undergo fewer temperature fluctuations than air under all these conditions.
However, if the medium is confined to a bucket, a raised bed, or some other container, then these fluctuations will become more rapid and intense and the temperature profile will become closer to that of the air surrounding them. The medium loses its ability to serve as a temperature control for the roots under these conditions, resulting in an under-performing root system which cannot supply the top zone with all it needs. Shallow-rooted plants work with wider temperature fluctuations closer to average day/night air temperatures, whereas deeper-rooted plants have to handle smaller fluctuations and cooler temperatures than this average.

Regulating plant temperature

The plant’s root system does not regulate its own temperature, and once temperature in the medium strays outside the optimum zone for reactions to occur, it can no longer supply the rest of the plant with the optimum level of water and nutrients. This is the case whether the temperature is too high or too low. The greater the fluctuation in temperature in a 24-hour period, the more stressed the root system will become, and the more problems a plant will have both physically and pathologically, and it will become increasingly susceptible to pathogens and insects. Placing any root system in a medium above ground will increase the surface area from which heat can be gained or lost.
plants become dormant when the root system stops most of its functions, whether this is a result of too cool or too hot conditions. This is true in container plant nurseries located in warm, sunny areas. In the summer, the containers warm up due to the surrounding air temperature and the plants go into a second period of dormancy even though they are being watered and fed for maximum production and growth. Even the temperature of the irrigation water or nutrient solution will increase or decrease the root function, and any sudden large temperature change will shock the roots. Good growers will warm or chill the water to be in the correct range before irrigating.

Close monitoring

Temperature is extremely important for plants to grow and flourish, but all the factors involved are much more complicated than we can go into here. The root and shoot systems have a different set of needs when it comes to temperature: one can function with larger and faster temperature fluctuations, while the other needs a much smaller, cooler, and stable range. Good plant growers will take this into account. A weak or poorly functioning root system will slow top zone development because it will not be able to perform the chemical reactions required by slowing the uptake of nutrients. Not all nutrients will be affected and some will be faster than others, which can show up as individual deficiencies.
The root system will develop and function best when kept within a specific temperature range and a good grower will monitor this closely, just as they would monitor and regulate air temperature. All parts of the plant are interconnected and nutrient issues can occur in plants that are being fed properly if the root zone temperatures stray outside the correct range for too long. In the end, there are two different and entirely separate environments that a plant lives in, and a good grower will pay close attention to both.

Link: http://www.canna-uk.com/root_zone_temperature_and_plant_health




Peace,
HGO

 

[Hundred Gram Oz]

Although I'm not a fan, Ed has got this information bang on.

I was wondering more about "Root Zone Temperature." What is it exactly and what would the ideal temperature be for the roots in the rockwool? And one more question: what is the ideal temperature for the reservoir in a hydroponic system?
Hydro Ho,
Internet
Root Zone Temperature (RZT) is self-explanatory - it is the temperature in the area of the roots. Marijuana thrives when its roots are kept at room temperature, about 72 degrees. When the air temperature remains at 72 degrees and the root zone is cool, which often happens when containers are placed on a cold floor, the roots do not work as efficiently as they do at a higher temperature.
RZT can also be used as an environmental variable in relationship to air conditions. If the air temperature is too hot, for instance 85 degrees, which is 10-13 degrees above the ideal, and the water temperature is lowered to the low 60's using an aquarium-grade water chiller, the cool water and the warm air seem to cancel each other out. Perhaps there is a heat exchange going on within the plant.
Conversely, cool air temperatures can be ameliorated using warm RZT.

Peace,
HGO

 

[Avinash.miles]

great info, beautiful flowers
thanks for sharing, HGO

 

[ozzieAI]

i place my pots on insulated matting when temps fall these days after noticing slower that usual growth when pots were straight on concrete during winter...or what passes for winter here...

way to fuck up a grow HGO...wish i could fuck up like that...

 

[Sleeper7784]

You always manage to impress. Can wait to be on your level. Keep up the hard work. The Vert. Show wouldn't be the same without ya.

 

[DHF]

Shit happens on the path to Nirvana Bro.....Most would be pleased with what you call a fuck up , and you callin it a fuck up just shows your attention to detail with full knowledge and experience that they all could look better and be bigger at this point in the game , but......regardless.....

Top shelf job even with the so-called hiccups my buddy.......Keep dialin......

Peace.....Freds............

 

[Hundred Gram Oz]

Root zone temperature is the one thing that can make the difference from an average grow to an amazing grow IMO, considering everything else is dialed. Since I've put the heater into the grow room my night temps are at 72F, I'll be tweaking things around so that instead of having 1 filter on full speed at night I'll have 1 filter on at half speed, that should bring the temps up to around 75F. I'll also be wrapping all my pots in bubble wrap for insulation. Along with all of that I'll have rez heaters on timers to come on at lights off, I'll get the water up to 72F and give the plants a feed during lights off, all of this will hopefully keep my rootzone temps at a constant low - mid 70's range. I'll have a soil thermometer

Keep on tweakin' maggers,
HGO

 

[Dope time]

Space Station...

 

[Aardwolf]

Looking like you'll be busy trimming HGO!

I have had a read through this thread and can't find where you said the area or m2 your growing those doughnuts in.

The spread on one of the rings of light at maximum looks less than a normal 1.2m tent HGO, your not growing trees.

I think that you should put a reflector on those bulbs, up the pot size and grow in the room, hand feeding or something, less pissing around and use that whole room, there's enough light for it.

Put chicken wire on the roof so DHF is happy and just plant one strain for future reference, grow your flavor in a tent!

Hope all is well and that you are happy in yourself with the next grow buddy!

Just some last bit advice, with a room like that have a heat mat made to measure, HOTBOX will make one room shaped, it will eliminate all your environmental shortcomings.

 

[d4nk]

ive seen cold root temps do that same type of thing. call it the crystal ball syndrome, really small really frosty nugs.

 

[RB26]

Looking good Hundred. I didn't catch any pictures of your CM flowered out, you have any?

 

[GreeeeN GRassss]

any updates HGO?

 

[Hundred Gram Oz]

I'll get some update pics tomorrow guys, all is going well I'm at day 37 Flower, flush starts next week for the 8 weekers....Karma Train, Critical Mass, & Killer Queen.

Just got Triangle Kush and Joe Schmoes Casey Jones cut too.

Peace,
HGO

 

[DHF]

Shmoe`s Casey cut as well as the Triangle Kush are definitely proven top shelf quality as well as producers Bro.....

Glad all`s rollin your way my buddy......

Peace.....Freds........

 

[Grizz]

your way to hard on your self, your like myself, never satisfied . looks damn good to me.