PadawanWarrior
Well-Known Member
So a slurry test it sounds like? Using distilled water?
Grow #2 MK-Ultra organic live soil no nutes
- Thread starter Px9023
- Start date
Depends on test. 1 calls for r/o
NanoGadget
Well-Known Member
I'll let you Pada figure your pH issues out.. that being said, the only thing I'd take issue with is your light on Temps. Can you get those up a little? Plants do better under LED between 80 and 85. 75 is what you'd be shooting for under HPS, but LEDs lack the necessary IR to bring leaf temps up to optimal if your ambient temps are too low. other than that it looks like you're off to a good start.
PadawanWarrior
Well-Known Member
They look fine now so I wouldn't change much, but I do some curling on the edges it looks like. That's why I was asking about pH. Usually there's not much need to check pH in organic soil though.
You still never said what water you're using and what the pH is to begin with. That's what I'm wondering
Using dechlorinated tap water starting Ph is 7.0 125ppm. So is the curling high soil Ph or Low Soil Ph.
Yeah I can get them up I've heard so many different takes on temperature. Not really sure the correct answer.
PadawanWarrior
Well-Known Member
I'd stop the pH down and feed 7.0 water. I usually use straight 7.8~ well water most of the time. That's what they get tonight too.
NanoGadget
Well-Known Member
I've been growing with LED of the sort you're using since 2017, if you're going to believe someone on this issue I am your huckleberry.
Yeah I am letting the heat rise now I'm about 78 should get to 81. What does increasing the heat do by curiosity m
7.0 isn't to high? I thought for soil you want a ph of 6-6.8? I had a pH issues last grow where the pH got to high. Just a tub bit nervous since they look pretty healthy and I'm about to flower. I messed around with pH right before flower in screwed myself. So you think the curling is due to pH being to low?
PadawanWarrior
Well-Known Member
If it was me I'd stop. The microbes and fungi can regulate pH in organic soil for the most part. I'd try it and see how they like it.
Okay will this mix is much more live and much more fortified. Thanks for the advice!
NanoGadget
Well-Known Member
I attempted to briefly explain in my initial comment. Cannabis has a range of temperature that it prefers for the surface of it's leaves to grow optimally. the reason people shot for 75 f under hps is because hps produces sufficient Infrared Radiation to heat the surface of the the leaves to several degrees above the ambient air temps. think warm sun on your face. LED diodes used in most horticultural lights produce little to no IR so they don't heat the leaf surface much beyond ambient air temp. to summarize, your leaves were cold bruh.
Okay I didn't realize that the light that I bought had IR diodes. I thought that was enough. Thank you for the info. The rooms heating up now. Is it true that if the room is CO² enriched to 1800ppm (I believe that is what I read) that you can increase the temperature to 95f with no negative effects on growth?
NanoGadget
Well-Known Member
I don't supplement CO2, so I'm not positive about the exact numbers, but you are correct. supplemental CO2 allows you to grow at higher temps and utilize more light leading to increased photosynthesis.