I have never thought to ask this question before; does water/nutrient temperature have much impact on cannabis plants in soil/coco? I have always tried to water in +/- 70f which is my spigot water temperature most of the year. But during winter it gets down to the lower 60’s F and I warm it up.
Common sense tells me that the water temperature should be close to the soil temperature so as not to shock the plants too much. Should I concern myself with my watering temperatures and are there any other affects that water temperature may have on cannabis plants in soil/coco? As always thank DGC. Happy Growing 🙂
Recharge the Fourth Macronutrient
No you’re right, let’s do it the dumbest way possible because it’s easier for you.
Your idea of me is not my responsibility to live up to.
“I can explain it to you, but I can’t understand it for you” T-shirt
SAVE THE HIGH, GROW MORE SATIVA
60’s F are not an issue.
Too cold and you shock the roots. Too warm and you run the chance of root rot.
I aim for room temp or around 65 degrees for my water, but in all honesty, I just add it without much regard for the temp if I know it is in the middle ground of not too cold or hot. The Goldilocks zone I guess 😉
Gotcha thanks guys. Wasn’t too concerned but why not ask the pros. Happy Growing 🙂
Recharge the Fourth Macronutrient
No you’re right, let’s do it the dumbest way possible because it’s easier for you.
Your idea of me is not my responsibility to live up to.
“I can explain it to you, but I can’t understand it for you” T-shirt
SAVE THE HIGH, GROW MORE SATIVA
I asked this question to myself once and went down a rabbit hole because there are good science documents to read through. None of those documents are for cannabis, of course and that is an important note because different species and genotypes will perform differently in different environments.
The root zone temperature is an aspect of the total plant environment that can be manipulated for plant performance and I’ve read enough evidence to believe a plant with a controlled root temperature is more resistant to heat stress and various other conditions. This isn’t something to pay much attention to for the vast majority of growers. Room temperature is usually perfect.
Your common sense won’t steer you wrong with this one. I’ve watered with 60° and I’ve watered with 78° and don’t recall a difference. My res sits around 72° so that’s the norm for me. The root zone should be cooler than the canopy and I believe that is the only critical part. A watered pot isn’t going to necessarily be the temperature that you pour in especially if you’re using a fabric pot or the like.
Coach Steve, Jmystro and Chad thanks for going down that rabbit hole so I don’t have to. I’m totally satisfied with those answers, should I ever get into hydro I’ll ask again. Happy Growing 🙂
Fill a 5 gal or whatever the night before you plan on watering, place it in the grow space (with a lid or cover to prevent it messing with your current RH) by the following day, the water in the grow will be the same temp as the root zone, this is the most foolproof way to water in what you know the plant prefers.
All my well water growers this time of year know what its like when your ground water is coming out the tap at 45-50 degrees! No one wants that rained down upon them, humans included.
I wouldn’t go colder than that. I try to always feed with room temp water. Severe temp fluctuation in what your feeding can actually change the ph of the water.