Hi you all! I have read that in hydroponic, specially in Flood and Drain systems, the best water (nutrients) temperature should be 68-75, being the sweet point 68, but in another thread I have read that it should be from 60-68f, being the sweet point 65f and in a third thread the author refers as the sweet point at 72f!!!
So I have a mess in my head, in your "experience" what is the sweet point for water temperature (please, note that what you have probably read is important but experience counts two times)
Thanks for all your help

I like 65 and throw in a few frozen pop bottles in the tank when needed to get it back down.

Make sure the bottles are small ones (8oz) so they can more around and not get cold spots on the roots.

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Hey Lumix, thanks my friend for your opinion and ideas but I have a water chiller, which is one thing that I am happy I used to have it when I had a marine aquarium, I use it for cooling the water temperature and it works great, but my problem is that everytime I read a different thread, there are different sweet points, and from 65 to 72 there are 7 degrees gap, which is a lottt!

Nutrient up take is optimum @ 65 for cannibis.... I believe

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Fear is the only darkness that exist

That got me thinking and looking around.I too like it at a lower temp in the res,but reading Mel Thomas Cannabis cultivation complete grower's guild, he says at 75 degree the plant will up take all the nutr in the mix.I dont know my res stays at 70 and at night 68 and I dont have any problem.I wouldnt go any higher then 75 degree and no lower then 64 degree.Lets see what we can find on this and what system what temp is best.And post it here. Peace

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Anything I may say or do is stickly for entertainment only.This is all make believe and is not To believe by me or anyonehttp:\\www.greenpassion.org/f73/over-grow-government-ogg-2009-what-8722/

Couldn't this be strain-dependant, as well as being affected by other variables, such as ambient temperature, growing medium, nutrient levels, amount of light, et alia?

Remember: Cannabis is a "weed." Very hardy. I'd imagine the results from keeping the temperature within a given range of 5-10 degrees would be more or less indistinguishable from keeping the temperature at a hard-and-fast temp.

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"We'll work it out as we go along. Let our practice form our doctrine, thus assuring precise theoretical coherence."

I have done some research of green enviroment and 3 to 4 degrees in today world is going to erase a lot of species from the planet, so I think a 10-11 degrees difference (64-65 min to 75 max) is way too much of a gap. I don´t know probably weed is a survivor (a natural warrior, like reptilians) and MJ has a fast readaption genes??? For example, cannabis has a way to survive, femail plants will become hermis, and pollinate heeself. Another very interesting thing, after several years female mothers can produce male clones!!! This is Mother Nature´s evolution way, or not?
That is why I have asked to post your experience about water temperature, because everything I read is sooooo different!!!

Hi Toke,
Yeah, I must agree with you about the range you are currently using. I used to have it at 72-73f, but yesterday I have started to move it a little colder, 70-72f, as I have read that at 75f and up the air ppm is way lower than at 68-70f, and oxigen in the root zone is very important. And on the other hand, a lower temperature is good to keep algaes and mold away
I really don´t know what is the SWEET point, just trying to find the right answer

For example, I think a good indication should be the temperature of (spring and summer) rain in Tropical areas, as it is what Nature delivers to our beloved plants. It is important to know the temperature in those areas as it is where our plants are original from. Does anybody has a link for this info?
Thanks

Hey where are Scott and JustAnotherBozo when they are needed, they always provide wonderful links, lol
Thanks for all your help
PS: Hey Scott, sorry when I did the above call I didn´t know you were leaving. Once again, good luck!

I'm just positing the theory that there is such a wide range of recommended temperatures because there are also a considerable number of other variables influencing the situation. That is, one temperature might work best for a given set of conditions, while a different temperature would be ideal under different circumstances. I would say start wherever your most reliable source suggests, and adjust as needed from there. One of the best ways to learn is by doing!

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"We'll work it out as we go along. Let our practice form our doctrine, thus assuring precise theoretical coherence."

Good advice, the only way to be sure about something is to try
Thanks

High 4ever! LOL!!! so I'm 3 months slow!

I just got to this thread today and>>>

What are the differences between a 'male' and a 'hermie'?
Could they be perceved as the same 'non-female', plant but different?

I do not know.

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Ciao
4maggi

The future ain't what it used to be... Yogi Berra..
Ask Lucas: https://www.cannabis-world.org/cw/showthread.php?t=892

Hi 4Maggio,
Among other things the main difference is that male will NEVER produce seeds, and hermies and female will produce them
Peace

High 4ever...

So then, if grown out only pollen from the boy clones...
Then they must be indistiguishable from girls while still on the mom..

That sucks.

30-40 days shot to hell and then ya gotta start new seeds.. another 30 days (at best) and they may still be boys...
this game gets harder and harder..

But you're right.. it is an amazing plant.

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Ciao
4maggi

The future ain't what it used to be... Yogi Berra..
Ask Lucas: https://www.cannabis-world.org/cw/showthread.php?t=892

Don’t overlook that plants are getting their nutrients from way under ground, which is going to be cooler than the surface rain.
Also take into account that sativa mostly originated closer to the equator where it’s hot and indicas from areas cooler. So a sativa dominant would probably prefer the higher end of the scale and indicas the lower.
If anyone has a big enough grow opp with a wide variety of strains it would be interesting to know what each one likes best.

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Temperature of nutrient solution | Cannabis Culture Magazine
I would have to say that this appears to answer all questions regarding the sweet spot of temperature.