Hi everyone, my question is the next. I got normal thermometer with sensor cable plus i got ac infinity system thermo sensor in side the tent,but the appliance show different temperature like a two cable but not far from each other as you can see on the picture.So wich is the correct?The sensor cabel's are bit higher than the appliance but not much or that much can make about 1.5 c difference specialy the sensor cable closer to the light like a appliance.Thanks for help guys!

Continued / moved from another thread to avoid hijacking. I have an Arizer Extreme Q and a Mighty+ vapouriser. I bought the latter as I got sick of lugging the Arizer around to friends houses, but I still use both. Although I sometimes vape at 196+ until the vapour runs out too, because it is the closest to smoking that you get with vaping, I mainly vape at three temperatures, typically 175C, 186C and 197C or thereabouts. I like getting a lovely load of flavour with the thinner THC high, then a beefier, woody effect with the rest of the flavour at a middle temperature and then the go to sleep fraction with a nice throat hit for satisfaction at 197C. I have always done this with my Arizer and filled ballons with tasty vapour, using most of what the herb contains with those three takes. I had assumed that the Mighty+ would give me a similar level of control, but my early experiments haven't shown that it does. I have a working theory as to why. I think it may be because the Arizer is convection only, whereas the Mighty+ is conduction and convection. So perhaps the Mighty+ temperatures are actually hotter than the Arizer's temperatures at the same reading, because with the convection only approach, the temperature at the tip of the heating element will be higher than the temperature of the air actually reaching the herb. This would explain why with the Arizer set to 175C I get 4 or 5 very productive pulls and then there is almost nothing left, even at 200C, which is a very different experience. I was asked who would bother with a "giant machine you can only chog near a wall outlet, when we have the mighty and crafty pluses?" I know there are quite a few people who enjoy this for a variety of reasons, like I do. I haven't had the opportunity to experiment yet, but I guess I will begin tonight! Mains powered doesn't mean better than battery powered. The Mighty+ is an exquisite machine with few flaws and the Arizer is too in its own delightfully clunky way :). Each type of device have their pros and cons. I am hoping that I can use the Mighty+ in a similar way to the Arizer if I do so at lower temperatures, say 150C, 165C and 180C instead of the Arizers 175C, 186C and 197C. Does anyone out there do this with a Mighty+, perhaps having had experience with a desktop vape that is based on convection like the Arizer, or maybe even the Volcano and have some advice to offer? Please and thank you

What are your thoughts on optimising your environment and nutrition? When transitioning from HID to LED lighting, it is important to adjust the environmental parameters in your growing area to ensure peak plant performance. The Dio-Tech emits less heat energy than HID, this should be compensated by either, adding heat to the room, reducing the speed of the extraction fan using a fan speed controller or both. This is important to achieve the correct leaf surface temperature. If the leaf temperature falls below its ideal range and gets to cool it will affect the plants Phyto morphology and growth rate as it reduces nutrient uptake and its ability to absorb Co2 due to its inability to transpire. The ambient air temperature of each grow room will differ slightly but as a rule there is around a 4°C differential between a grow room, running with HPS (high pressure sodium) vs LED’S. As a rule, a room running with HPS aims to have an ambient air temperature of between 24-26°C this puts the leaf temperature between 29-31°C. When transitioning to LED’S, the ideal ‘lights on’ ambient air temperature needs to increase to between 28-30°C (or 30-32°C, if supplementing the area with CO2). These increases in ambient air temperature will in turn keep the leaf surface within the correct temperature range. Humidity can increase if the grower reduces the fan speed on their extraction unit to elevate their ambient temperature. To combat this the grower may need to install both de-humidifier and a humidifier with controllers to work in unison to maintain the ideal grow room humidity. The ideal humidity (RH) is 60-75% for vegetative growth and 50-60% for flowering. If temperatures are too cool, growth will be inhibited, and nutritional issues can occur. If humidity is too high the risk of fungal pathogen infection increases. High humidity and lower leaf temperatures reduce the rate of evapotranspiration (the flow of water from the roots, through the plant and out of the leaves) this also reduces the amount of nutrition entering the plant and negatively affects the mobility of calcium and magnesium, which will lead to deficiencies. If temperature and humidity are not optimal, adding Cal-Mag at a higher concentration to your usual growth schedule will help compensate for this. Vapor Pressure Deficit (VPD) is a measurement used to define how the temperature and relative humidity of a growing area effects the evapotranspiration rate of the plant. Using a VPD chart to set temperature and humidity parameters will significantly increase growth rates and yield. Digital Thermometer/Hygrometers are an essential piece of equipment for every grow room. A data-logging unit such as the Air Comfort will enable the grower to track environmental changes more accurately.

hi all, Ive been having a smoke and pondering about the effects of thermal mass in a grow enclosure (as you do!) wondering if anybody used thermal mass in their design set up, what did you use and did it help with your temps? I was thinking of covering the floor of my tent (its only a tiddler 60x60) in block pavers on a slab of insulation - theory being, this would absorb the heat when lights on and slowly release this stored heat at lights off.

HI I have been doing some reading and I came across vaporizing. The research in this book seems to be decent and I was quite surprised to read about asthma and vaping herb. Now I have 3 questions (Maybe I should have made 3 posts 1: Anyone with Asthma here that vapes , and what is your experience 2: I am looking to buy a decent-good vaper without breaking the bank (a dry herb vape is what I am looking for but oil support would be a nice addition) and yes I am looking at Amazon 3: The temperatures are unclear: If you go at the highest temp setting...do you do damage to the components that evaporise on the lowest setting? iaw Are you better off moving the temperature gradually up over the session ?

does anybody know the minimum room temperature for Autos, if i were to keep the roots warm with heat matts at around 18c - 20c? i have my intake from inside my house so at night the intake temps can drop to about 14c at night in the winter ideally i dont want to have to add a oil radiator or anything, for space and for the running costs!

Hi, A little question about ambient temperatures, which may seem over the top. I know that ultimately, cannabis will grow well with a stable day/night temperature or a few degrees variance either way. I was reading an article on High Times about grow temperatures though and the article says that having lower daytime temperatures than night-time temperatures can lead to a shorter internodal length and therefore shorter plants overall. I guess most people wouldn't do this because it costs more to air condition / ventilate harder during the day and heat more during the night, but it is an interesting 'fact' and I wondered if anyone monopolised on this technique to keep taller plants in a reasonable height range for indoor growing efficiency? Also, as I will be heating my shed to keep temperatures acceptable and definitively set a stable temperature difference at different times of day*, would you think I would be best off setting a stable 24/25C growroom temperature 24 hours a day, or using a timer to turn the ambient heater on and off every 15 - 30 minutes to so, causing small peaks and troughs? In case the high-times article is of interest, it is here: https://hightimes.com/grow/grow-hack-day-and-night-growroom-temperatures/ I hope that is permitted. Thanks in advance folks Midge

Hi All I am growing 7x Autoflowering Plants outdoors this year. I even Germinated the seeds outdoors. I planted the seeds directly into pots i am growing them in. I planted in black 11 litre pots, so i won't need to transplant them into anything else. This year i am growing 3x Northern Lights, 3x skunk 1, and 1x Cash crop, which was a freebie. All the seeds came up, due to the excellent weather, we have been having here in the UK. They get full sunlight from 8AM till about 7PM. My only concern is the temperature of the weather. What temperatures are to hot for Auto's to grow in safely. People say give the plants as much sunshine as possible, but surely if the weather gets to hot, won't that do damage to the plants. My plants are in black pots sitting on concrete slabs. What do you guys think.

First post guys go easy on me. Been following for years just never signed up. Now I have a conundrum and after some thoughts. I have as much airflow as I can arrange so adjusting this is currently not an option. which of the following is likely to yield more - 3 x 600w and 1 x 400w hps light and a canopy temp of 32 degrees c during lights on (with good circulation) (also temp below canopy and at pots is around 26) - 3 x 600w Hps only and a canopy temp of 27 degrees c during lights on all 4 looking healthy and fine I just can’t decide if i should drop 400w and have ideal temperatures or use the extra 400w and have canopies above ideal temps. discuss...

Greetings fellow growers. My question is this, Do you monitor root zone temperatures if so what temperatures do you aim for and how do you achieve this without overheating the grow space or the foliage? I am growing in Allmix under a 275w LED full spectrum in an 80x80x2m Black orchid. My plants are 18 days old. Photoperiods, Green Gelato from RQS. The light is at about 80cm giving about 250 PPFD which generates enough heat for the canopy with a small boost from a 80w tube heater. The plants are in one litre fabric pots positioned on a heat mat for seedlings and young plants. I am trying to heat the root zone to about 22c by having them on the heat mat but this generates a lot of heat which rises up under the leaves reaching about 30c in places. I have tried various different methods of placing the pots on the mat. i now have them raised on up turned pots to lift the plants above the seed mat but still heat the base of the plants and hopefully the roots. This works but takes about an hour to reach 22c when the heat mat kicks off and the soil has reached the desired temperature. Will this heat damage the plants? I am watching them carefully and one plant seems to be suffering from droop. Possibly too much water but I am weighing the pots before watering to ensure not excessive but i might be wrong. They are still small in relatively large pots so One of them might have had too much. I try to grow them all exactly the same, to try and keep them even heights. The first grow I had three plants which all finished at different heights so had to raise two of them up by about 10 inches. . So is there another method for heating the roots without excessively heating the immediate space that the plants are in. I had thought perhaps building a sand pit with warming cables to put the pots on but this would be the same as a seed mat, or would it? Any suggestions or experience based opinions welcome. I have been scratching my head with this one. There must be a simple solution. Although I read an article by a horticulturist in which this seemingly simple goal is not so easy. How can the root zone be properly heated without heating the rest of the plant. The article suggests for plants outdoors it is fairly easier for the plant to establish a median temperature in the soil outdoors but in a grow space where the plants are in pots it is the fluctuations in temperature in the root zone which is bad for the health of the plant. Ant thoughts please.

Hi all just wondering, what are safe night time temperatures outdoors, if the plants are still young and in 11l pots, in the UK. what temperatures should you consider bring them inside, and what temperatures are ok to leave them outside. I live close to Cambridge in a town, warmer than coastal areas. Many thanks

Hi Guys! I hope that I can get some help in my first grow. I bought my grow setup with following inside: - 1.2x1.2x2m tent - Carbon filter fan kit 4'' - 4 breathable 16L root nurse pots - 600w Lumii Black Light kit - Canna coco natural - Canna a+b I have already planted 4 seeds, 2x white widow, 1x amnesia haze, 1x Skunk XL and they are already seedlings about 3cm long. I ordered few more things which I am waiting for ph meter, digital thermometer, 2x 6'' fans for air circulation. The most important thing that I worry about is temperature, I am still waiting for thermometer to check it but while light is running is literally really hot in the grow tent so I think is too hot and 4'' fan that is connected to carbon filter is not really doing the job. Do you think that 2x 6'' normal fans will help ? At the moment my budget is really low so cannot buy some big expensive fans. In around 2 days I will try to update you guys with exact temperature. I hope you can guys help me. Looking forward to your replies !

For those using fittings from the excellent @diyleduk - what temps do you run at? My mind tells me that 25-30 for veg and 20-25 for flower should still ring true, because - light is light? But I've read a few posts about running higher with LEDs but I'm unsure whether these claims have any merit to them.

Planning on running intake&exhaust looking for a twin fan controller to help me control temps. Can anyone make a suggestion? & if you can remember the price paid it would be helpful since I'm trying to compare price. Thanks in advance:) & HAPPY NEW YEAR!

Please move if posted in wrong place Hi everyone. Been reading on here for a while found a lot of helpful information that’s helped me with my first few attempts. Long story short I started growing to help my mum who had terminal cancer with pain relief, fast forward 18 months and I’m now on my 4th grow. I’m struggling to achieve gpw and think this is down to my environment. I have a 1.2m bloomroom loft tent. I have a 6 inch outtake with a rhino filter. Currently using passive intake with a bit of ducting from room below. Running a 600w hps with dimmable omega ballast. X2 oscillating fans, humidifier for veg. 700w oil filled rad for lights off. My fan is a rhino thermostatic but I don’t think the temp control is very reliable. I’ve been using 11l pots with pure canna coco. Using canna range a and b, rhiz, cannazym, boost and pk. Swapped pk for bloombastic on current grow as advised by someone better than me lol. Watering every 2 days up to 2.5L in flower! Don’t seem to be getting the growth I would like in veg and seems to take forever for them to gain size! Now for the questions please! Do I need an intake fan? If so what size? Recommendations on fan controllers for intake outake and heater? Or easiest way to control them all? Would I be better doing 9x6.5l? Less veg time? If so would I put them straight under hps from cutting? A lot more info to share with you guys if you need any to help me! Sorry to ask so many questions on my first post! Thanks in advance

Easy people, Still struggling away in an attempt to achieve the holy grail... The perfect environment! Moved my tent into a different room for my latest grow. It's now in a cooler room which is on the detached side of the house so come summer I can fire up the fan a bit more and not worry about the neighbors! I've got a 1.2 tent with a 315 cmh and a 600w hps (which I run between 600-400w depending on the weather) and am managing to maintain a nice 25-28c canopy temp. When the plants were vegging floor level temps were sweet, but as I've put a net in the canopies developed and now I'm struggling with the floor temps being too cold. Between 15-19c at lights on If I have the oil rads on surely the heat will just rise and so will canopy temps? Am I going to have to some heat mats? How do you guys have your tents set up?

Hi there, Anyone know anything about aeration of roots in a coco mix? Any particular times that are best, night time vs day time, once a week vs few hours a day... I am wondering if theres too much air being pumped as I can't imagine it being too good if that causes heat build up in the plant medium. What is the optimal temperature for the coco medium? I put a temperature probe in and the pot is currently 24°C. Is the medium too warm?

Hi buds. I'm posting this here as well as on my diary. I've already started with the 18/6 lighting cause the sprouts popped out and added the nutrients. However, I'm having a hard time setting the environment. My main problems are: 1. The 400w HPS bulb is hanging few inches from the top of the tent and I'm still getting a minimum of 28.8 C (in the picture I'd just switched the light on). Too hot :/ 2. RH has gone from 60-70%, which I considered ideal, to 40% with the lights on. Not looking good. 3. Water temperature is also a problem, even with bottles filled with ice the minimum I get is 21 degrees, and just for a couple hours. 4. I removed the air pump because of the noise and ordered a new one that's supposed to arrive on Monday. Not that it worries me too much because roots didn't reach water yet. All in all, I don't expect much from my first grow, as I understand hydroponics requires more experience and I'm a complete newbie. However, I would like to get tips from experienced growers and learn from my mistakes. Cheers buds!

Hullo, First timer here, 1.2x1.2x2m Mars tent with 600w Solis-Tek digi ballast, 6" exhaust, pulling through a f^k off carbon filter. Hand watered coco with Canna nutes. At the moment I'm just getting my bearings and while my Type K thermocouple thingamy has been invaluable during the hot weather (barely managing to keep below 30c during hottest part of day, but the girls are seeming to love it =) ). However I'm thinking I might need to get a handle on the moisture levels in the air as they really start to party hard. So would appreciate a product that will allow me to put sensors where they will do most good, and more importantly allow me to take readings without having to wake them up (ie have the display outside). Not above building some sort of home brew "fabracobbled", GitHub sourced thing, but prob more sensible to start with a working unit that will give me a baseline to be able to move forward from. Don't want IoT stuff, no RGB, simply something that works, every time, without alarms or "features" that won't get used, think Nokia rather than iPhone =) Finally I would like something that will manage to survive at least a couple of seasons, but not having me have to sell the kids. So if you have come across such a thing, please point me in the right direction. Cheers, PS Also I wondered if there was any benefits to other things to bring the moisture down rather than a full on de-humidifier ? (N.B. NOT affiliate links) Bags of magic stuff that pull in moisture (along the same lines, Or if it gets really bad, bite the bullet and get.. Big thanks in advance B

Oioi I need some advice on keep temp low in tent and humidity high with out spending loads. I've got five dark devil auto on the go but temps are exceeding over 30 degrees and humidity drops when I turn extracter fan on. Any help would be appreciated

I've just opened my tent to find condensation all over the lower part of it while my humidity meter reads 39%. My temperature is 25.5c while my fan seems to be running at low speed, which is set at 30%. Is my problem that my low speed set point is too low for the transpiration level of the plants while the correct temperature is being maintain so easily by the fan? Does that make sense to anyone else? Ta Fax

Hi everyone just after some opinions and an answer to some questions. First of all what is the ideal temps and humidity when flowering starts? I read somewhere but cant remember where, do the plants take up some of the temp and bring it down? Im struggling to get my tent down below 25 degrees currently started week 2 of veg. Should I transplant into a bigger pot once I go into flowering? I have fabric pots what do you guys think of them? Thanks in advance.