I’m very happy with the terps, when you open the jar it just fills the room.
I run 3 ec until flip then slowly drop as stretch progreses, right now I’m at day 35 and I’m at 2.2ec under cmh. Led would require higher feed ec.
I soak my rockwool then let dry back 25% moisture content the first initial dry back.
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I was scared of 3.0ec as well. Im pushing it a little over 3.0ec with one variety. Everything looks amazing. I recently switched nutrients, now I run athena, no clease sub southen ag garden friendly fungicide, and ag50. Pictures coming…im only at day 30ish.
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I don’t use agt in my res but my mom/veg room get regular foliars of it and I spray them until day 14 of flower.
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Show us some pics bro!
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Will do i grab a few photos tomorrow
If you talk with an athena rep, they will tell you it’s environmental, if you run leds 3.0 isn’t enough generally.
If your vpd is off they won’t be able to use what you give them so you will see issues, especially that high… however if you run too low you face potential problems also,
so you need to keep ec consistent through veg,
Beginning of flower you want generative growth so you dry back more, cool the room and keep lights ramping up with excess uv, by mid flower your ec should be stacked in the media, you want to switch to back to vegetative which is less drybacks and more smaller irrigation events, and less uv which flushes the media and lowers the ec
Lights and vpd equate to how much water vs how much nutrients the plants consume.
Then late flower you want to go back to generative which is larger irrigation events and drybacks equal to the shot% to again raise ec in the media and finish ripening the flowers, UV up again to increase productivity of cannabinoid synthesis and terpenes.
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It’s been a while since update, any new insights or adjustments made in the meantime?
I was wondering how timing is calculated for p1 shots? Let’s say it takes 5 minutes for your shot size, do you count the time when it finishes dripping and then wait 15 minutes or count it when you started your irrigation event independent how long it drips?
I’ve seen suggestions for generative steering even 30 minutes between shots, do you change the time between or stick to the same timing just changing the shot size for dryback?
I’ve been now steering generative as possible from flip until harvest, with going generative it helps with better quality vs vegative bulk flower fill.
P1 I water every 15 minutes so 4 times in a hour regardless of the shot size, and also try to keep p1 to an 1h-1h15min max.
Basically I’m a lot of what i was doing before is not what I’m doing now, trying to only hit run off at the end of p1 then not again until the next day. Now it’s easier to mess up substrate ph doing this so you need to be on top of it.
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Did you have to increase your substrate size to accommodate for this change? As I can see sometimes you’ve had 25 total irrigation events before just to keep VWC in the proper range and rockwool can start forming hydrophobic pockets.
My meters are coming this week and once I finish my last bags of coco I would also like to start switching and playing a bit with rockwool.
I’ve listened to Aroya’s after hours and following people on IG they still have P2 from around 21 to 42 days so it’s interesting to see that you’ve practically steering all the way generative. It does make sense but it seems much harder to keep the plant happy this way.
I usually start seeing fraying on my leaves from too high EC stacking if I push too much generative. But it’s more my own fault for using cheaper sensors and waiting too long between shots. Trying to dial it in more, appreciate you sharing the knowledge. <3
I’m just using 4x4x2.5 on top of slabs, still using p2 and one small p3 during lights off.
I don’t really look at dry back moisture percent anymore and use pwec for steering. It’s all about creating osmotic pressure to try and build quality vs yield.
Using vegative steering for bulk is crazy the amount of biomass you can produce but it it’s at a loss of quality.
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How is it going for everyone in the crop steering world?
I have recently been watching some videos by Ramsey Nubani on field capacity and Feed vs substrate vs runoff EC and find this approach to growing fascinating.
It seems like from the tone of the videos, which are over a year old, that he was going to continue releasing info on the subject but never did. I’m guessing he decided to become part of Aroya and they wanted to monetize that knowledge instead. Does anyone have more back story on this situation?
I also see it looks like the Meter group started selling the Teros 12 sensors to the general public, at least through Agrowtek, is that correct? I thought they previously were only dealing with big operations or something like that.
Can you all suggest a good place to do research/reading on crop steering for cannabis besides this forum? I’m hoping they do some of this is the Utah State Cannabis course later this year.
Crop steering techniques have been used for decades in greenhouse agriculture and that is where most of the information comes from. Just remember tomato’s are a completely different crop and cannabis is in the theory of application phase.
Floraflex has a decent online data base of the basic principals. Plant Empowerment The Basic Principles takes these concepts way farther.
Over the last two years I’ve learnt a lot, if your growing for quality steer generative. If you push veg during bulk your just lowering your quality by increasing biomass.
Get your pwec up to 6 quickly as possible and try to never let it fall under that. I’ve been aiming for 6-8 pwec saturated, closer to 8 during flower. And keep it at a max of 13-15pwec, I’ve seen my plants can take higher but i don’t think it’s necessary.
Monitor your run off ph religiously and keep that in check. A lot of times when there’s an issue you’ll see itv in the substrate ph, with rockwool i jab a syringe in the cube and suck out a sample, if in a pot just lift and collect the run off. Do this at the end of your p1.
All this being said environment is very important.
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You are under LED correct?
Indoor hps
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Lots of good info on that write up, thanks for that. What do you like to do if your pH is off? Get some decent runoff with pH adjusted input ?
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Have you heard of Steven Landry on instagram and YouTube ? (mainly IG).
@ cannabis.mechanical
He’s an hvac master who claims his design can make an air handler or mini split act as a dehum removing up to 800 Pints per day, don’t quote me word for word on that. He also sells the document on how to do it so your hvac tech can follow along.
I’ve been talking to our faculties hvac tech and he talks so much crap at first he says it makes sense and agreed then retracted his words later on. Funny enough, Steven made a post right after on IG saying that you’ll have noob techs say it’s a lie because their jobs depend on it. Which is true! We have so many dehums up causing our ACs to always be on and needing work on them.
I almost missed the main point. If you want to research the tech it’s called “reheat kit hvac”. Plenty of YouTube videos and articles , stevens just the one who niches in our industry.
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That’s the type of hvac units we have it’s all all in one unit 30 ton with hot gas re heat and also propane reheat. These will do 1000sq ft flower room.
About ph i used to do like you said and either adjust the input ph or increase run off to get required substrate ph and after learning the proper way from @danielfp now I’ve been adjusting the ph based on formulation. Nh4 helps lower the ph and if the ph is to low you can remove some nh4.
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Do you monitor run off ec at all? One strain sometimes will show 5-7 but leechate on some are 9-10. Usually would do more run off to put more in line but this also decreases ec in the block. Still dialing in having more data to play with. But don’t want to be too greedy. What would you say the upper limit should be?