Flushing: The Myth that won't Die

[BII]

But you would not do a "Final flush" of water for a week in coco? You could feed up to chop in coco and no flush at all and be okay?

I feed right up to harvest. I see no logic in starving the plants, washing nutes out of the soil/media, nor see how reducing nutrients in the soil/media reduce nutrient levels throughout the plant. If you want to stress the plants at the very end to push trichome production (another myth?), I presume there are better ways than reducing nutrients.

 

[pop22]

That's correct.

But you would not do a "Final flush" of water for a week in coco? You could feed up to chop in coco and no flush at all and be okay?

 

[Dabber]

I'll flush when I put a toilet in my grow space feed pop to chop

 

[Fitzy]

But you would not do a "Final flush" of water for a week in coco? You could feed up to chop in coco and no flush at all and be okay?

No last 2 days I would give water but only enuff for normal 10% to 20% run off like normal then I would put in dark for 2days

 

[Son of Hobbes]

@pop22 did you ever post this?

https://atrium.lib.uoguelph.ca/xmlui/bitstream/handle/10214/12125/Stemeroff_Jonathan_201712_Msc_with_erratum.pdf?sequence=8&isAllowed=y

This is the thesis paper by Jonathan Stemeroff, who showed the effects of flushing vs not on plants, from 2017.

*edit - Jonathan, not Joseph. friggin J names.

 

[pop22]

No, it's the first time I've seen the actual paper, thank you! MYTH BUSTED! :smoking:

@pop22 did you ever post this?

https://atrium.lib.uoguelph.ca/xmlui/bitstream/handle/10214/12125/Stemeroff_Jonathan_201712_Msc_with_erratum.pdf?sequence=8&isAllowed=y

This is the thesis paper by Jonathan Stemeroff, who showed the effects of flushing vs not on plants, from 2017.

*edit - Jonathan, not Joseph. friggin J names.

 

[Son of Hobbes]

No, it's the first time I've seen the actual paper, thank you! MYTH BUSTED! :smoking:

@derek420colorado are blasting this out in a few Facebook groups right now, ho ho ho it's troll city lol.

 

[Simplicio]

Here's the flushing conclusion from near the end of the paper https://atrium.lib.uoguelph.ca/xmlu...2_Msc_with_erratum.pdf?sequence=8&isAllowed=y

"6.2 FLUSHING NUTRIENTS FROM GROWTH MEDIA
The practice of flushing is a current common industry practice but there is no evidence in published literature of its effectiveness in reducing nutrient concentrations within the bud or even whether or not this is a desirable result. After testing the nutrient concentrations from each treatment from three separate experiments, there were no significant differences in nutrient levels between any treatments within each experiment. This result showed that the intended purpose of flushing to reduce nutrient concentrations within the bud has no effect. These data show that for the last two weeks of the flower cycle for cannabis, it was possible to use no fertilizer water for irrigation with no significant impact on yield while saving input costs on fertilizer."

 

[Son of Hobbes]

I think you guys posted the Rx one?

Cannabis Flushing Research Study

In our research study, RX Green Technologies evaluated the effects of different flushing times on chemical profile, flavor, and smoke of cannabis flower.

www.rxgreentechnologies.com

 

[pop22]

Nope, I didn't post that one either. But thanks for more information.

I think you guys posted the Rx one?

Cannabis Flushing Research Study

In our research study, RX Green Technologies evaluated the effects of different flushing times on chemical profile, flavor, and smoke of cannabis flower.

www.rxgreentechnologies.com