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Temp humidity

Dropped it to 79 and 76 without lights. Plants seam happy for now. When do you guys do your first water change in your res? And I mean guys in an all around term inclusive of all the super great female growers out there!
 
Well they recommend 7-10 days, I watch the PPM's and as long as they are steady I know my nute water is good and stable, its when I watch it starting to bound +/- 5 points I know the water is now longer stable. That is my basic guide, depending on which nute company I was using really depended on how long I can keep nutes stable for.
 
I have done at least a dozen grows in New Mexico, where there simply aren't a lot of months which don't get into at least the 80s and stay above 60 at night. Very seldom have I lost a healthy plant due to temperature, and mostly they have yielded completely acceptable product. Lots of weed has always come from places south of the border, where it is probably much hotter than wherever you live. If you intend to grow in a hot climate, I suggest:

1. Get your plants used to higher temperatures from day one. They often have trouble adapting to big changes halfway through their lives. Larger roots take time to grow.
2. Watch the water very carefully. Plants can dry out suddenly and won't survive even a short time if they do. As long as they have water, they will probably prosper.
3. Obvious, but I'll say it: Run your lights at night when it is cooler, and use a fan (or three) to pull in some cooler night air.
4. Sativa genes come mostly from tropical regions, so they tolerate heat better.
5. Recommended concentrations for nutrients may need to be changed. Watch your plants and follow your judgement rather than 'standard' recommendations. They may need twice as much water when it is hot, but that doesn't mean they need twice as much nutrition.
 
Thanks guys , my ppm has been steady since I added low nutes after sprouting. Think I'll do it this weekend that will be day 10. Ever heard of pulling out the water and letting your roots get an air bath, the putting the same water back in?
 
Just went out and said good morning to my plants before their lights go out for the day. At 07:30, it is 91 degrees and 28% RH in the grow room. Everybody is doing fine, they are on 11 hour days right now, just waiting for their trichomes to turn golden. This is my first crop under LED lighting, and I'm impressed. Five healthy plants, four varieties, 30 to 70 inches tall growing in 4 gallon cat litter buckets of plain old cactus potting mix.

Cannabis is an extremely determined weed. I've seen it grow successfully and yield a very decent crop under far from ideal conditions. Nebula describes the very best conditions and methods, but when reality doesn't let you follow her advice as closely as you might wish, DON'T PANIC. Matching her results may be difficult, but getting 90+% in terms of end product is entirely possible under less-than-ideal conditions.
 
Thanks so much, my first indoor hydro grow . Funny I don't worry as much about my outdoor plants , just water and check for bugs. Thanks for reminder , it's called weed for a reason.
 
If the roots were to dry out for example you'd kill the plant... yes roots needs oxygen to survive, etc... but roots develop differently and when I have been talking to people who know way more about all this than I do, I've heard them discuss "water roots" and "air roots" with me and how the plant specifically picks the right way for its growing environment. Hence why when I tried to take soil based roots, wash off the soil and put them into hydro they'd die, and yet if I was growing roots in an aero-cloner and tried to put them into soil, I was having issues again with plant dying... Thus brought me to asking more questions about the roots and why I perhaps got the answer that I got from people with more education than I on this subject. I just know that if the water roots dry out the plant dies.
 
I know that if you get outside of the plant's comfort environment according to books, the plant spends more time fighting to cool itself and less time growing. One of the ways I get around hot temps is to use Yucca Root, as it is known to help plants with heat stress act like its not nearly as hot as it is, and I know it works because it is how I battle heat stress during the hot parts of the summer with all my plants.
 
Ok so I'm a complete dope. Had my lghts set on during the day and off at night. Dugh! Changed the timer. All that education and I can't figure that Its hotter during the day on an outside wall. Ha ha. I'm gonna blame it on over medication
 
Not just that its hotter during the daytime, but the electricity is also cheaper at certain periods of time of the day too... hence why when it comes to things like chillers some companies will store all their chilled water at night to use during the day to save on their electricity for cooling costs.
 
supplements containing silica and seaweed extracts can help a plant tolerate temperatures slightly above normal
 
I know its said some Kelp (seaweed) is supposed to be better than others for helping with helping the heat, but I've never heard that with Silica before... which then makes me question which type of Silica? In a video by Harley Smith, on YouTube he points out that one type of Silica needs to be added to the res First, and another one last... and I always sat there dumbfounded... I thought there was "Silica"... but then I just thought Nitrogen was just that too... when it comes to a plant, how little did I realize there are three types of Nitrogen a plant can use. So I just figured I'd ask if you know where I might read more on Silica being used for helping with the heat, because thus far I know the Silica I use toughens a plant up against bending, breaking the trichomes in flower and helps ward off chewing bugs by toughing up the plant's cell walls to insects. I'm always looking to learn new and exciting things, so if you don't know where you read it that's okay, I will keep hunting to see if I can find more information on it myself too.
 
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