Should I flush or not ?

Op don't listen to me listen to the majority of the industry (commercial growers, dispensars, breeders, etc). Most of the science that doesn't want you to flush comes from nutrient companies and their affiliates that lose money everytime a grower does a 2 week flush. Rx green technologies and others like it want you to load that baby up with their nutrients until the last day of the plants life. My advice to anyone that's not sure what to do is do your own test and go from there.

The difference is not huge but at worse case scenario you're saving yourself mixing time and money on nutrients your not using for 2 weeks.
 
My thinking is that the last two weeks are when the buds are putting on weight.

Why would you not want to help/feed the plant do that ?

Your cure is much more important to final flavor !

Cheers
 
Green Refuge said:
Op don't listen to me listen to the majority of the industry (commercial growers, dispensars, breeders, etc). Most of the science that doesn't want you to flush comes from nutrient companies and their affiliates that lose money everytime a grower does a 2 week flush. Rx green technologies and others like it want you to load that baby up with their nutrients until the last day of the plants life. My advice to anyone that's not sure what to do is do your own test and go from there.

The difference is not huge but at worse case scenario you're saving yourself mixing time and money on nutrients your not using for 2 weeks.
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Explain how nature flushes. Also name another crop that gets flushed.
 
Green Refuge said:
Op don't listen to me listen to the majority of the industry (commercial growers, dispensars, breeders, etc). Most of the science that doesn't want you to flush comes from nutrient companies and their affiliates that lose money everytime a grower does a 2 week flush. Rx green technologies and others like it want you to load that baby up with their nutrients until the last day of the plants life. My advice to anyone that's not sure what to do is do your own test and go from there.

The difference is not huge but at worse case scenario you're saving yourself mixing time and money on nutrients your not using for 2 weeks.
Click to expand...

Just for the record the Rx Green Tech study does not suggest feeding until harvest, I believe their nutrient line has a suggested "flush" during the last weeks if I remember correctly. It simply shows there is no difference in nutrient levels between flushed and none flushed cannabis. The logical conclusion would be that feeding with just water the last week or 2 would save some money on nutrients, which is counter to your claim they are just trying to sell more.

Until recently "flushing" was described as pouring 3x the volume of your medium worth of water through the medium. It can be useful to correct extreme over feeding or nutrient imbalance, but can still be damaging to the root system so it should be avoided unless necessary. Flushing has no merit at all for removing nutrients from the plant, or making the smoke smoother or the ashes burn whiter.

Just using water the last 2 weeks because the medium/plant has plenty of nutrients already is just called "watering" your plant....... Its very reasonable to use plain water for the last couple weeks. Most plants won't actually be uptaking many nutrients at that point anyway, and it saves on nutrient cost.


The key is not to get these things confused. People started changing the definition several years back at this point, it really doesn't make sense.
 
I think you have to make a distinction between what your growing medium is.

If it is soil, simple "watering" may be fine.

I grow in ProMix HP and can tell you if I quit feeding nutrients for two weeks I will not have to trim any leaves.

They will be crisp and fall away And more importantly, the buds will not reach their full potential.

Cheers.
 
ISK said:
Chop it when it's ready and your plant is clearly not ready...... it likely needs 4 or 5 more weeks

Seems to me you are hell bent to flush and chop that plant despite the feedback you are getting from those who know better.
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How do you see it that way ?
I barely responded since I didnt have the time to read everything
Im not hell bent on flushing (dont know how you got that idea) I just asked if its necessary and if it effects the quality

and as for chopping im hell bent on chopping because I have exams soon and dont have the time to do it later
 
Thundercat said:
Just for the record the Rx Green Tech study does not suggest feeding until harvest, I believe their nutrient line has a suggested "flush" during the last weeks if I remember correctly. It simply shows there is no difference in nutrient levels between flushed and none flushed cannabis. The logical conclusion would be that feeding with just water the last week or 2 would save some money on nutrients, which is counter to your claim they are just trying to sell more.

Until recently "flushing" was described as pouring 3x the volume of your medium worth of water through the medium. It can be useful to correct extreme over feeding or nutrient imbalance, but can still be damaging to the root system so it should be avoided unless necessary. Flushing has no merit at all for removing nutrients from the plant, or making the smoke smoother or the ashes burn whiter.

Just using water the last 2 weeks because the medium/plant has plenty of nutrients already is just called "watering" your plant....... Its very reasonable to use plain water for the last couple weeks. Most plants won't actually be uptaking many nutrients at that point anyway, and it saves on nutrient cost.


The key is not to get these things confused. People started changing the definition several years back at this point, it really doesn't make sense.
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In that case I meant watering not flushing with plain water
 
jondamon said:
Having read this I see nowhere about flushing removing anything from the plant unless you can show me yourself where In the article?

This sticks out to me though

Given that cannabinoids are the compounds that make cannabis so uniquely valuable, more work needs to be done to investigate the effect of mineral nutrition on cannabis yield, and the relationship between yield and potency. Further work should also evaluate other compounds that are known to impact product quality.


Seeing as you linked a study here’s the ones I was talking about.

www.rxgreentechnologies.com

Cannabis Flushing Study on Grow Nutrients I Rx Green

Rx Green’s research study on cannabis flushing explores the truth behind this urban myth in growing nutrients.
www.rxgreentechnologies.com www.rxgreentechnologies.com

Around 43mins Bruce talks about flushing.
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It's an interesting study linked, even if the linker didn't understand it.

The part you mention stuck out to me big time. So did this part:

"There appears to be an inverse relationship between cannabis yield and potency, with cannabinoid concentrations decreasing as plant inflorescence yield increases. Inflorescence from plants supplied with 160 mg L–1N had approximately 30 and 20% lower concentrations of THCA and CBDA than plants supplied with 30 mg L–1N (Saloner and Bernstein, 2021). However, while nutrient stress and deficiency may enhance inflorescence cannabinoid content, this method is not ideal for optimising overall plant productivity as plants supplied with 160 mg L–1 N yielded twice that of those supplied with 30 mg L–1N."

I'm not sure if I'm the guy to chase that sweet spot as diligently as would be required (I think you'd have to "get to know" the genetics of any particular cultivar), but it's a bit of knowledge I'll tuck away for future reference.
 
xtsho said:
Flushing to cause the "Fade" at the end of a plants life is just starving the plant. That "Fade" is the plant taking nutrients from other parts of the plant to send to the flowers. Why people want yellow leaves at harvest make absolutely no sense. And since those mobile nutrients are sent to the flowers all that's happening is the plant starts dying. You don't smoke the leaves so why would you starve a plant forcing it to cannibalize itself for flower production?

There is real science and then there is cannabis broscience. Those that don't have any experience growing plants other than cannabis typically believe the broscience over actual science as they don't understand fundamental plant science because they have been exposed to broscience for so long. In their minds it makes sense but in reality it doesn't work that way.

Not really worth arguing about as those that think it actually does something will never be convinced that it doesn't. They think it does something and absolutely no amount of actual scientific proof will convince them otherwise. They don't actually understand how a plant uses nutrients and until they do they will continue to believe in flushing/starving their plants.
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What about sugar-leaves?
I could cite a study where a hemp plant's leaves contain 1,5% copper of dry weight.
Hemp/ Cannabis is very useful for phytoremediation because of its inane ability to draw heavy-metals from the soil and accumulate these in leaves.
Many buds you see have high leaf-to-flower ratio and some seem to be even mostly leaves.
There's another medical US review on MJ quality and it states 3 large main concerns - one being impurities (the other 2 are mycotoxins & pesticides)
 
You are not removing anything from a plant by flushing. Go bare root and aeroponically rinse with distilled water and for the time plant lasts on the already induced compounds. Nothing is removed or altered beyond water content. Chemicals and compounds are not available to rinsing or transpiration.
 
another thread on flushing absolute waste of time - pretty sure people ask this question just for a reaction, no one in there right mind would flush plants- reducing nutrients near end flower only -maybe , is this what people refer to flushing these days ... to many stupid growers out there push flushing plants for fade ( some think they are gods ) - absolute load of sh*t in my view . @Kassiopeija gees you can spin some crap about crap , what else do you flush in life...
 
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