DrFever
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Sure there will always be some NPK in your plant. True. But you can minimize by letting the nutrients stay in your soil not in your bugs by letting the plant "sleep" instead of rage and be up taking and holding nutrients in the middle of the day. Think about it...Its was actually the stitching institute that did tests and found higher THC with 72 hrs off but also mentioned that it worked on some strains not all .. i have shut it down for 72 hrs and think that of course your going to gain some resin production , is it negligible YUP
but as plant stays in darkness the plants batteries are also dieing out so now pending on last day i run lights i may leave plants in darkness or few days for instance friday or sat chop and your plants are done tuesday or wed ...
topo ??? there is always gong to be NPK in your plants no matter what,, lights off is going to do nothing any stress is going to hurt the plant you here a bunch of ice water flush lol , or flushing period etc its just another myth many uutrients are hard to leach from the soil ,, organics why bother flushing same thing with chem just back off last week
Since your in hydro you should feed your plants the last week the normal ppm that your running in flower then chop your plants for harvest and that shit will taste like nutes and burn your throat to shreds. Yes organic is different. Pardon my French.I'll find that study. I do 48 hours of dark, but just because a lot of the better growers do it. I never had any concrete evidence it did anything.
I wonder if that terpene chart showing highest levels at dawn would still apply. My guess would be yes.
The flushing thing I'm still not convinced on. For example, we use blood meal (dried blood) on our plants in soil. Once the plant has absorbed that, it's no longer blood meal. Just like we eat an apple & our body divides it up in the sugars, vitamins etc & sends it where it's needed, it's not an apple anymore. Grass fed beef doesn't taste like grass, & corn fed beef doesn't taste like corn. However, those two do taste different. I use manure in my veggie garden, but my veggies don't taste like horse poop.
I understand the...the best way I can think to describe what the flushers are trying to do is induce a sort of catabolic state so that it's using up the nutes left in the plant. But the plant is not absorbing the nutes in the same form we added them. (go back to the horse poop example) I've tried flushing, & not flushing in soil, & given a proper cure, I don't notice a damn bit of difference. On paper, there may be, but in real life, I don't notice a difference...in soil. The fact that I was organic probably helped, but I'm still not quite convinced.
I'm hydro now, so I will have to see how it works with that. But in soil at least, I just stopped feeding them the last week or so, not to induce that state (I forget the name) but I think it's a waste. There is plenty left in the soil (I check) for the plant to survive on. The soil is getting tossed after, so why waste the nutes.
Since your in hydro you should feed your plants the last week the normal ppm that your running in flower then chop your plants for harvest and that shit will taste like nutes and burn your throat to shreds. Yes organic is different. Pardon my French.
If I was running 4k HPS and turned them all off and hit it with about 2k MH, Would this work alright for me ? Wanted to do the 48h dark for first time so now you made a valid point and I'm thinking that seems more realistic of nature. Thanks!So we would only usually turn down our lights the last few days/weeks of flower in the rooms that run a little warm so we can bring temps down and really close/harden the buds. We have also run 10k mh lamps in the past and this absolutely has had an indisputable positive effect on the finished product. You're basically emulating winter in that the days get cooler and the light gets blue-er.
I think that turning down the lights and the effect it has on the plants has less to do with the actual light and more to do with the room temps, this is at least my take on it. I think this goes the same for the 2 days of darkness, just 2 days of cold weather and the plant freaking out thinking winter is coming which stimulates extreme trichome production in hopes of catching pollen to reproduce.
Glad you brought your 40 years of experience to the farm, welcome.I usually dont make it a habit to comment on forums 2 yrs old, but very recently, I was in a meeting about the subject of reducing light Intensity the last cpl weeks of flower...SO, Maybe someone will still see this and pick up the tip....I see that some do believe it replicates the fall sun better to reduce the intensity...this is of course why red spectrums are better for flowering since THAT DOES replicate the wave length late season....
I also dont make it a habit of posting info unless I am 110% sure about the info I post....One of a growers worse enemy is trusting TOO MUCH in forum info....There are way too many persuasive ppl in forums, that can only grow a good case of toenail fungus...
Spring of 2019 will mark 40 YEARS that I have been growing cannabis hydroponically....There is NOT a scenario, that I have yet to experience in that time.....Now to the subject at hand....reducing light intensity late flower.....It was a cpl decades ago, where seeing, what I call secondary buds, develope better resin densities..these are the buds, lower on the main colas and even the first cpl sets of buds that have a stem with length AWAY from the main stalk....Regardless of strain, this was occurring...why would these big main colas have less resin development than their neighboring buds a little lower....Years of pondering, AND comparisons (and I mean DOZENS), That buds love to be POUNDED with intense light to gain mass up till 5.5-6 weeks, considering strains that finish from 8-9 weeks...AFTER the mass is done, its all about ripening those resins that ALREADY exist....Raising lights was the key before Digital dimmers were available....Now, its a simple flip of a switch....Soon as this was realized, my Main colas were as frosty as my 'secondary' buds....Ripening resins is more of a delicate process than many realize....It is also QUITE POSSIBLE, and the main culprit, to evaporate resin....too intense of a light the last 10 days-2 weeks can cause more harm than good to the buds closest to the light, typically being you best main colas....Resins are a protective response, to UVB, pests, etc, but LATE SEASON in nature, has a sun much lower in the sky with a considerably reduced intesity.....I have seen it to be not as much of a concern when growing with like a 400w HID, CFLs, or other less intense lighting sources....BUT with 600-1000W hid lighting sources, YOU WILL BENEFIT, by reducing the output to finish ripening....I personally run a 1000w HID system...I reduce it to 50% the last 2 weeks and get resins that make your mouth water, all the way to the very top of the tallest colas....Again, not as important with less intense lighting, but VERY IMPORTANT with high output lighting....reduce it!!!... your buds are already as big as they can get, and its time to PAMPER your Trichomes and pump them up to their genetic potential...This is NOT based on scientific data, but is based on 4 DECADES of growing experience....IT WORKS!!!!...YT
The whole point of darkness is to stop the plant from uptaking nutes and fading the plant in darkness the plant uses its stored energy;) it also tells the plant its finishedTo add to my previous post, co2 is only absorbed during the time the plant is receiving usable light. Reducing the usable light would likely reduce the amount of co2, nutes and water it could draw in to use during the night to grow. Reducing usable light is bad idea imo. I have heard of several techniques to trick a plant into producing more terps and thc such as the hot water shock, raising temp, or even buring hot coals near the root ball but I would just stick with full power 12/12 myself and maybe 48 hours of dark at the end.
Will be very interesting to see your results i suspect you dont really need a control group if you have done that strain a few times before broView attachment 840727 I’m actually experimenting with the Emerson effect. I added some far red leds to my quantum board setup and they come on the last few hours the lights are on and go off 15 minutes after the other lights shut off. I’m interested to see if it helps at all. Of course I have no control to compare it to, it’s just cheap enough to try and I’ve heard the results are better yield, quicker flowering times and better potency. Who knows though. We’ll see.
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