Advertisements
  • Ali Bongo, Head Shop UK, buy best bong UK, Percys Grow Room
Notifications
Clear all

[Sticky] Flushing your medium

Page 2 / 2
Zombie Nation
(@zn)
Valencene
1 Plant of the Month Win
10k Post Likes
Chat Moderator Bling
Active Grow Diary Bling
1 Complete Grow Diary Award
Admin Bling
The High Council Award
Sex Pot Grow Off
OG
Points: 65069

@jacks_farm

They have the misguided opinion that loads more food means bigger buds 😀

ReplyQuote
Posted : October 30, 2020 1:04 pm
galandil, Doctor X, Hart and 4 people liked
Macky
(@macky)
Beta-Pinene
Patreon Bling
Instagram Admin
PlayStation Squad
10k Post Likes
25K Post Likes
Chat Moderator Bling
1 Complete Grow Diary Award
The High Council Award
Twitter Rep
Admin Bling
OG
Points: 97096

@jacks_farm and they follow what the bottle, or manufactures guide says. Its not their fault though, as ZN said, they think more food equals bigger plants.

Join us live every Sunday for High on Home Grown!

ReplyQuote
Posted : October 30, 2020 1:18 pm
galandil, Doctor X, Hart and 4 people liked
jacks_farm
(@jacks_farm)
Linalool
Known Member
Points: 8395
Posted by: @james
Posted by: @basssman7

Science says flushing makes no difference to yield, THC or terpenes or taste.

Everybody that checked the differences between flush and no flush knows flushing does make a difference.

Also it is known that a generic Medical is chemical same to the original. Anyway generic and original work different for people.

I do not think we are able to analyze the important parts of it. Just remember we do not know 90% of anything energy or material.

I think that is the case for a lot of growers because they need to flush out excess salts in the medium before harvest.

Nitrogen encourage the canopy and buds to strech and Bush out and it very high ec (salt content)

so I don't want any nitrogen in my root mass by week 6 (12/12) and want to see the lower canopy drain the nitrogen from the leaves and as the leaves fall off it helps to reduce humidty and reduce humidty helps to increase the amount resin the plant produces, letting the plants really dry out a few times at this stage seems to increase resin production 

when the plants in mid/late flower it uses more sugar to mature the buds 

so use something like (top max), (honey or brown sugar in hot water)  to make the buds sweet and dense 

if you feed a plant what it needs at the right time why do you need to flush the root mass ?

ReplyQuote
Posted : October 30, 2020 2:09 pm
galandil, Doctor X, Hart and 3 people liked
James
(@james)
Linalool
1K Post Likes
2.5K Post Likes
5k Post Likes
Active Grow Diary Bling
Respected Member
Points: 12873
Posted by: @jacks_farm

why do you need to flush the root mass ?

1. I do not think if you work organic its needed to flush. But I do not know that.

2. It does not matter what part you flush as the conentration of salts in water with membrances equalizes.

You can see this with 2 eggs just put salt on the yellow of one and salt on the clear part of the other.

2 hours later you will see an obvious difference.

Means if you flush one part of a plant nature will take minerals out of the other to equalize the molecules per litre.

Other then with the egg salt can pass the roots membrane.

Plants are like children - always surprising you.

ReplyQuote
Posted : October 30, 2020 3:51 pm
jacks_farm
(@jacks_farm)
Linalool
Known Member
Points: 8395

sorry @James I kind of understand what your saying about 

"conentration of salts in water with membrances equalizes" but doesn't really answer my question.

just saying if you feed a plant what it needs at the right time, you don't need to flush 

IMO flushing a plants can be very stressful to a plant in late flower and really increase the humidty in the flower room, seen growers snap buds and there not sure when to water next, can really throw things off 

Think my plants about 3 weeks in flower (12/12) under a net and its settled and happy getting its 2ltrs of water every 2-3 days ( start adding honey soon)

don't want to move them till harvest or cause them too much stress

ReplyQuote
Posted : October 30, 2020 4:31 pm
Doctor X, Hart and James liked
Woolie
(@woolieback)
Myrcene
Patreon Bling
1K Post Likes
2.5K Post Likes
5k Post Likes
Active Grow Diary Bling
Chat Moderator Bling
1 Complete Grow Diary Award
Reddit Rep
Legendary
Points: 28125

Aye thought you were in coco 😉 

Suckin on Diesel

ReplyQuote
Posted : October 30, 2020 4:48 pm
James
(@james)
Linalool
1K Post Likes
2.5K Post Likes
5k Post Likes
Active Grow Diary Bling
Respected Member
Points: 12873

@jacks_farm

I actually flush before flipping to 12/12 but I am on Coco using Bio Pellets at first time (3 weeks) and salt based later on.

2 weeks before harvest I simply do not feed anymore. I just give PH`d water.

 

And to give a plant exactly when it needs what is sth I think only nature can do.

Thats why I think flushing may not be needed really if you grow on soil. Those nutes are not directly available.

Plants are like children - always surprising you.

ReplyQuote
Posted : October 30, 2020 4:49 pm
jacks_farm
(@jacks_farm)
Linalool
Known Member
Points: 8395

@james general rule of thumb I do think most growers should flush before harvest

If there not carefull about the amount of nutes they use in flower.

 but this is a good read

hightimes.com

ReplyQuote
Posted : October 30, 2020 4:55 pm
Doctor X and Hart liked
TempleGrower
(@templegrower)
Myrcene
1 Plant of the Month Win
1K Post Likes
2.5K Post Likes
5k Post Likes
1 Complete Grow Diary Award
The High Council Award
Moderator Bling
Chat Moderator Bling
Legendary
Points: 20340
Posted by: @james

Everybody that checked the differences between flush and no flush knows flushing does make a difference.

Quite the opposite actually. Anyone who has actually looked into this scientifically has found the exact opposite. This blurb is from that U of Guelph study back in 2017 where he looked at this exact situation and found there was no difference in the amount of N,P, and K in the flushed tissue compared with tissue that hadn't been flushed. Check out the actual study (see Section 4.4) for the methods, analysis, and figures, if interested.

Flushing Discussion   Stemeroff (2017)

Life's a garden...dig it - Joe Dirt
Supersoil recipe (by me!) --> https://percysgrowroom.com/organic-super-soil-recipe/

ReplyQuote
Posted : October 30, 2020 5:10 pm
Bandit
(@bandit)
Ocimene
Forum Regular
Points: 1542
  1. @yoda OMG you got a whopper there. I am green envious Thumbs Up Bongin  
ReplyQuote
Posted : November 3, 2020 4:50 am
Yoda, Hart and monkeydo liked
johnsmith559
(@johnsmith559)
Percy Grower
Percy Grower
Points: 244

@percysgrowroomb

hello

so I am new here but not to growing . I have worked on the commercial end for a few decades. 

I am so happy to see an article on flushing and maintaining medium EC ( or salt level ) 

high medium EC is the number one cause of nutrient lockup and false deficiency symptoms ( they are deficient just not because they are not there ) 

there are a couple things I would like to add. ( will post photo of the three best non weed hydroponic books .one of which ROCKWOOL IN HORTICULTURE by Dennis Smith has a lot of information about SLAB EC .) 

One is the terms used are INPUT EC , SLAB EC, OUTPUT OR RUN OFF EC.

rhe slab ec should run about 25 to 50 % more than the feed or input ec and 5ou can tell that by the waste EC . so just as an example 

feed 1200 microsemeins( Us ) 

waste 1500 to 1800 Us 

if it hits two times ( 2x) thr input flush the medium with enough 1/2 strength solution until in drops to reasonable range.  It good to use 1/2 strength so that 1) you replace the deficient ( or toxic buildup ) nutrient with some new nutrients.  push out the old but replace it with something. 

2 ) a 1/2 str. solution with some salts will pull out salts faster than pure water like growing a salt crystal on a string. 

It's important NOT to let potassium go deficient. It can take up to 2 or 3 weeks for it to start uptake again. That can happen if flushing pure water with no nutrients.Any sphagnum based media can be treated as a hydroponic media as far as flushing goes . I personally run pro MIX HP as a hydroponic media with multiple daily waterings.  

Carbon has an exact same ability to adsorb excess minerals the same way your air filter does ( called the vanderwall forces ) they will adsorb or buffer your medium to about 15 to 25% outside normal range but not forever just till you notice.  The buffering effect is also referred to as cation exchange capacity.  

PH is rarely my first thought when I am in carbon based soiless media .

A minor not about organics , the minerals in blood meal or compost are the EXACT same minerals in chemical solution . A nitrate ( NO3) from calcium nitrate Ca( NO3) 2 is 4he exact same nitrate as blood meal or compost .the only difference is how it is bonded.  nitrate in calcium nitrate is bon3d to an anion and in blood meal or such with a carbon along with a variety of other trace mineral. it is more or a time release system.. The minerls in organic also follow the Same absorption pathway. 

anions or negative charged minerals are absorbed through the solution while cations or pos+ minerals are absorbed from particle interaction.  ( will post page form hydroponic food production) .

the three best books I can not recommend enough are ( starting with the first one I recomend

HYDROPONIC FOOD PRODUCTION by dr Howard m resh ( this is the best all around book. it is full of systems that were marketed as new or unique but based actually been around for at least 40 years when this book was written)

ROCKWOOL IN HORTICULTURE by Dennis Smith 

best on runnig feed solutions nutrients and operations of a system.  imput , slab and runoff ec .it says rockwool but it the only difference is rockwool you run a slightly acidic solution but the operations are the same) 

ABC IF NFT by dr allan cooper ( boring 1977 lettuce and tomato production but they built everything as there was no where to buy . the best book on running the most basic minimal system. shows what 5ou can do with almost nothing. ) 

enjoy ! 

ReplyQuote
Posted : November 17, 2020 7:29 am
Hart liked
Page 2 / 2

In our cannabis growers forum, we have guides to growing cannabis, cannabis grow dairies that cover growing weed in hydroponics, soil and coco. Find the help you need, by either, using the search box, or asking for help in the forum.

Our cannabis growers website also has competitions where you can win free weed seeds. As a member you will also have discount codes for cannabis seeds, and LED grow Lighting.
Our Cannabis Growers Forum is for educational purposes and we encourage our members to check their country of residence legislation before germinating a marijuana seed.

This site is here because we want to help you grow your own cannabis for personal use. Therefore, any member who is suspected of growing cannabis for commercial gains will be banned immediately.

Please read our forum rules, and enjoy the site.

Percys Grow Room Facebook Page, Cannabis grower forum fb page,
percys grow room twitter icon, cannabis growers forum
pintrest logo percys grow room, cannabis forum
percys grow room instagram logo

Find us on all social networks! Just search for Percys Grow Room