FlushingVsNotFlushing & Chlorophyll Breakdown (Help a fellow Newbie/wanabie Gromie)

The Florist

Active Member
All of the pro flushing society believe they get smoother smoke from “flushing” the excess nutrients out of the plant!

those that don’t flush know that smooth smoke comes from a good slow dry and decent cure.

a wise person once said you can’t remove nutrients from a plant by flushing copious amounts of water through its roots.

that’s a fact!

If you want to read what happens when plants are subjected to flushing of the roots then look towards tomato plants and what happens to them during a “flushing”

They end up getting fruit split!

RX green technologies have a study which is most likely one of the Studies @curious2garden linked.

what she, @curious2garden is referring to with an ulterior motive is that you’ve most likely not found any people that can provide you with anything scientific about why to flush and maybe just maybe want to invoke an argument which maybe didn’t happen in the last thread you made on the subject.

Now.

one thing I can tell you is that towards the end of the cannabis plants life it uses less nutrients to sustain its growth during the ripening stage of your buds.

personally I see a drop off of nutrient requirements from my plants once their main growth is done and in waiting for ripening to get to where I want it to be.

When I used to be hydro this would manifest itself in high EC returning back to the reservoir after flooding.

so towards the end of the plants cycle (around week 6 of actual flowering) I begin seeing EC going to the plants at approx 1.0-1.2EC pH5.8 and returning back at 1.4-1.6EC pH5.3.

this means the roots are using more water than nutrients to sustain their growth during that phase.

So I would adjust accordingly and reduce EC down to around 0.8EC and pH5.8.

this would then return back at approx the same level meaning that nutes and water are uptaken at the same rate.

With hydro you can track how the plant utilises the nutrient water based on how it returns back to the reservoir.

by doing this you’ll see that there is never a time where water only is ok as this process ends with nutes and water uptaken towards the end evenly at about 0.6-0.8EC plant size dependant.

Plant size dependant means my 2ft tall hydro plants aren’t using as much of the nutrient solution as my mates 5ft tall hydro plants.

Sorry to have rambled on but thought it pertinent.

If you have any questions on the above let me know but I’m no scientist!
Cheers - i've not much clue how hydro works/but found the relative information i understand definitely useful!

Im not by any means invested in either side of flushing but more just what both have to offer.

@curious2garden 's link did answer my question asked in the previous post/thread - but there are other questions asked in the above semi related which is why i just reposted and edited no dam motive lol.

Ok so couple questions - whats EC haha?

Also - would chlorophyll break down through flushing besides nutrient deficiencies?

Also also - NVClosetmedgrower mid to late flower 38 minutes he talks about how after flushing the excess/general nutes out of the soil the plant leeches more back into the soil aweek later . . not saying i agrree or disagree but i am curious if anyone has a quick answer to it and would be genuinely grateful
 

Star Dog

Well-Known Member
Omg no again!
Using a starvation technique and passing it off as flushing, of course you can't flush anything out of a plant the idea is to let it use up its stores/reserves.

As I've said before if you feed and dry it then it can't not have residue like it's impossible if it's had feed.

Idk if a plant can or does use up whatever reserves but there's a chance of no residue without flushing there's no chance.

Try it for yourself is the best thing to do.
 

jondamon

Well-Known Member
Cheers - i've not much clue how hydro works/but found the relative information i understand definitely useful!

Im not by any means invested in either side of flushing but more just what both have to offer.

@curious2garden 's link did answer my question asked in the previous post/thread - but there are other questions asked in the above semi related which is why i just reposted and edited no dam motive lol.

Ok so couple questions - whats EC haha?

Also - would chlorophyll break down through flushing besides nutrient deficiencies?

Also also - NVClosetmedgrower mid to late flower 38 minutes he talks about how after flushing the excess/general nutes out of the soil the plant leeches more back into the soil aweek later . . not saying i agrree or disagree but i am curious if anyone has a quick answer to it and would be genuinely grateful
Tbh I’m not a full sciencey kind of guy but I do read quite heavily and chlorophyll I remember reading is required to help the fermentation process begin in the curing jars. Something to do with it being needed to start the processing of sugars.

I’m sure it was possibly RIDDL3M3 who posted information about it but he left a while ago to setup a private forum for more “advanced” growers. I can’t remember fully.

all I know is this.

since I stopped flushing (approx 7-9years ago) my harvests are heavier and taste better than anything I grew before.

now don’t get me wrong in a soil grow you can use straight water for the last 7-10 days and see no negative impacts in the plant tissue because of residual nutrients still in the soil and the fact the plants require less overall PPM aka EC than that of a plant at the height of flowering.
 
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The Florist

Active Member
Tbh I’m not a full sciencey kind of guy but I do read quite heavily and chlorophyll I remember reading is required to help the fermentation process begin in the curing jars. Something to do with it being needed to start the processing of sugars.

I’m sure it was possibly RIDDLEMETHIS who posted information about it but he left a while ago to setup a private forum for more “advanced” growers. I can’t remember fully.

all I know is this.

since I stopped flushing (approx 7-9years ago) my harvests are heavier and taste better than anything I grew before.

now don’t get me wrong in a soil grow you can use straight water for the last 7-10 days and see no negative impacts in the plant tissue because of residual nutrients still in the soil and the fact the plants require less overall PPM aka EC than that of a plant at the height of flowering.
wow... awesome <3 like neither am i man i although i use them as a basis so i have something to blame XD

that being said i appreciate personal experience/s

thanks a heap really helped
 

curious2garden

Well-Known Mod
Staff member
All of the pro flushing society believe they get smoother smoke from “flushing” the excess nutrients out of the plant!

those that don’t flush know that smooth smoke comes from a good slow dry and decent cure.

a wise person once said you can’t remove nutrients from a plant by flushing copious amounts of water through its roots.

that’s a fact!

If you want to read what happens when plants are subjected to flushing of the roots then look towards tomato plants and what happens to them during a “flushing”

They end up getting fruit split!

RX green technologies have a study which is most likely one of the Studies @curious2garden linked.

what she, @curious2garden is referring to with an ulterior motive is that you’ve most likely not found any people that can provide you with anything scientific about why to flush and maybe just maybe want to invoke an argument which maybe didn’t happen in the last thread you made on the subject.

Now.

one thing I can tell you is that towards the end of the cannabis plants life it uses less nutrients to sustain its growth during the ripening stage of your buds.

personally I see a drop off of nutrient requirements from my plants once their main growth is done and in waiting for ripening to get to where I want it to be.

When I used to be hydro this would manifest itself in high EC returning back to the reservoir after flooding.

so towards the end of the plants cycle (around week 6 of actual flowering) I begin seeing EC going to the plants at approx 1.0-1.2EC pH5.8 and returning back at 1.4-1.6EC pH5.3.

this means the roots are using more water than nutrients to sustain their growth during that phase.

So I would adjust accordingly and reduce EC down to around 0.8EC and pH5.8.

this would then return back at approx the same level meaning that nutes and water are uptaken at the same rate.

With hydro you can track how the plant utilises the nutrient water based on how it returns back to the reservoir.

by doing this you’ll see that there is never a time where water only is ok as this process ends with nutes and water uptaken towards the end evenly at about 0.6-0.8EC plant size dependant.

Plant size dependant means my 2ft tall hydro plants aren’t using as much of the nutrient solution as my mates 5ft tall hydro plants.

Sorry to have rambled on but thought it pertinent.

If you have any questions on the above let me know but I’m no scientist!
You nailed it. Here's essentially what I posted rolled into one not two posts

From the link I gave you:
"On pages 58, 59 and 60 you will find graphs showing that no matter how they tried to “flush” the plants out, the tissues still contained statistically identical amounts of the various major plant nutritional elements N-P-K-Ca-Mg-S etc…"

Where you will find the actual study and pages 58-60
https://atrium.lib.uoguelph.ca/xmlui/bitstream/handle/10214/12125/Stemeroff_Jonathan_201712_Msc_with_erratum.pdf
and
 

Hollatchaboy

Well-Known Member
All of the pro flushing society believe they get smoother smoke from “flushing” the excess nutrients out of the plant!

those that don’t flush know that smooth smoke comes from a good slow dry and decent cure.

a wise person once said you can’t remove nutrients from a plant by flushing copious amounts of water through its roots.

that’s a fact!

If you want to read what happens when plants are subjected to flushing of the roots then look towards tomato plants and what happens to them during a “flushing”

They end up getting fruit split!

RX green technologies have a study which is most likely one of the Studies @curious2garden linked.

what she, @curious2garden is referring to with an ulterior motive is that you’ve most likely not found any people that can provide you with anything scientific about why to flush and maybe just maybe want to invoke an argument which maybe didn’t happen in the last thread you made on the subject.

Now.

one thing I can tell you is that towards the end of the cannabis plants life it uses less nutrients to sustain its growth during the ripening stage of your buds.

personally I see a drop off of nutrient requirements from my plants once their main growth is done and in waiting for ripening to get to where I want it to be.

When I used to be hydro this would manifest itself in high EC returning back to the reservoir after flooding.

so towards the end of the plants cycle (around week 6 of actual flowering) I begin seeing EC going to the plants at approx 1.0-1.2EC pH5.8 and returning back at 1.4-1.6EC pH5.3.

this means the roots are using more water than nutrients to sustain their growth during that phase.

So I would adjust accordingly and reduce EC down to around 0.8EC and pH5.8.

this would then return back at approx the same level meaning that nutes and water are uptaken at the same rate.

With hydro you can track how the plant utilises the nutrient water based on how it returns back to the reservoir.

by doing this you’ll see that there is never a time where water only is ok as this process ends with nutes and water uptaken towards the end evenly at about 0.6-0.8EC plant size dependant.

Plant size dependant means my 2ft tall hydro plants aren’t using as much of the nutrient solution as my mates 5ft tall hydro plants.

Sorry to have rambled on but thought it pertinent.

If you have any questions on the above let me know but I’m no scientist!
Very well said!
 

Sparky413

Well-Known Member
One of the thing curing does is break down the chlorophyll, and that is why the smoke becomes less harsh. You can visibly observe the chlorophyll disappearing from your plant as you flush. You will have to wait a lot longer for that chlorophyll to break down if you don't flush.
 
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twentyeight.threefive

Well-Known Member
One of the thing curing does is break down the chlorophyll, and that is why the smoke becomes less harsh. You can visibly observe the chlorophyll disappearing from your plant as you flush. You will have to wait a lot longer for that chlorophyll to break down if you don't flush.
Yes. If you starve your plants before you harvest it'll lose chlorophyll as the leaves die. I prefer healthy non dead plants when I harvest. Besides I don't know anyone that smokes the leaves.
 

Dank Bongula

Well-Known Member
One of the thing curing does is break down the chlorophyll, and that is why the smoke becomes less harsh. You can visibly observe the chlorophyll disappearing from your plant as you flush. You will have to wait a lot longer for that chlorophyll to break down if you don't flush. To say there is no benefit to flushing, is to completely ignore common sense.
Yeah? You watch your buds lose color and fade too or just the leaves? I don't smoke the leaves so I'm not concerned with the chlorophyll breaking down until the plant is chopped and I'd rather my buds continue to ripen those last two weeks. Starving it at that point seems to completely ignore common sense too.
 

Hollatchaboy

Well-Known Member
Yeah? You watch your buds lose color and fade too or just the leaves? I don't smoke the leaves so I'm not concerned with the chlorophyll breaking down until the plant is chopped and I'd rather my buds continue to ripen those last two weeks. Starving it at that point seems to completely ignore common sense too.
Starving it at any point makes no sense, but those last few weeks are crucial and nutrition is still needed.
 

xtsho

Well-Known Member
Also also - NVClosetmedgrower mid to late flower 38 minutes he talks about how after flushing the excess/general nutes out of the soil the plant leeches more back into the soil aweek later . . not saying i agrree or disagree but i am curious if anyone has a quick answer to it and would be genuinely grateful
One of the reasons I don't watch youtube cannabis videos.

The process of how plants uptake water and nutrients from the soil is already proven science. The way a plant returns nutrients to the soil is through the plant matter as it decomposes. There are nitrogen fixing plants that pull atmospheric nitrogen from the air and then if the proper bacteria is present the nitrogen is converted from a gas and stored in nodules on the roots which after the plant dies and breaks down that nitrogen is then released and made available for plants. Plants that are nitrogen fixing include legumes such as beans, peas, clover and others which is why clover is used so widely as a cover crop in between seasons of growing.

Cannabis does not leach nutrients back into the soil from the roots a week after flushing. There may be some plants that are exceptions and have evolved differently but cannabis is not one of them.
 

Hollatchaboy

Well-Known Member
One of the reasons I don't watch youtube cannabis videos.

The process of how plants uptake water and nutrients from the soil is already proven science. The way a plant returns nutrients to the soil is through the plant matter as it decomposes. There are nitrogen fixing plants that pull atmospheric nitrogen from the air and then if the proper bacteria is present the nitrogen is converted from a gas and stored in nodules on the roots which after the plant dies and breaks down that nitrogen is then released and made available for plants. Plants that are nitrogen fixing include legumes such as beans, peas, clover and others which is why clover is used so widely as a cover crop in between seasons of growing.

Cannabis does not leach nutrients back into the soil from the roots a week after flushing. There may be some plants that are exceptions and have evolved differently but cannabis is not one of them.
Another great explanation!
 

xtsho

Well-Known Member
Another great explanation!
This one is even better detailing the movement of water and nutrients through the plant and the factors behind it. It's pretty interesting stuff and I in no way am claiming to be an expert. I do know that cannabis does not leach nutrients back into the soil through the roots after flushing though.

 

Sparky413

Well-Known Member
Yeah? You watch your buds lose color and fade too or just the leaves? I don't smoke the leaves so I'm not concerned with the chlorophyll breaking down until the plant is chopped and I'd rather my buds continue to ripen those last two weeks. Starving it at that point seems to completely ignore common sense too.
really? You remove all the leaf material when you trim? Do you know the bud grows around leaves? I have never in my life smoked weed that hasn't had some form of leaf in it. It's not ideal to starve the plant the last 2 weeks. You'll def get a better expression if you don't, and let it cure longer, that's not debatable. I don't flush, I grow organically. If I used synthetics, I would def. flush. I don't have 4 months to wait for her to cure.
 
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