Button Ads!         



                  GrowStoreFinder.com Grow Shop Directory            1-15-2014                              GreenBookPages.com Grow Shop’s Directory Product Reviews 
         Local grow shops and hydroponic store locator with reviews                      
Find Local Hydroponics Shops and Grow Stores.   10-10-14  
Mega Text Ad’s Spaces Available! 
                                                                                   Advertise On All 3 Of Our Marijuana Websites   


  We Update Daily!

Chris S. Kenoyer. Owner
MMJ Patient, Medical Activist,
Online Patients Advocate, 
Online MMJ News Journalist 

My Personal Medical Bio 

Follow Us Now On Twitter


Or Follow Us Now
  On Facebook

        Email Us Here

Or Email Us Securely Here
NEW 100% Encrypted Email Server

OLP’s Free MMJ News EList  
Get The Latest In MMJ News

Press Contact Info

 Is CBD?  A Possible Cure For
Breast Cancer..? And All The Other
Many Forms & Types Of Cancer..?
Learn More About CBD Here


Advertise Here On OnlinePot
Rates As Low As  $50 a Year
24/7 – 365 Days A Year Of Sales! 


Website Navigational Links

Main Start Page 2


Latest Marijuana News Reports


Parody’s Cartoons US 
Government Grown Pot,
Term Papers, School 
Reports, & Thesis’s On  
Marijuana & Cannabis


Amsterdam A to Z


Canadian Marijuana Websites


Church’s & Pot Cannabis


Co-Ops, Clinics, Dispensary’s 


Marijuana Doctors & Clinics 


Pot Cooking Recipes


Drug Testing A To Z


Pot Games


Pot Songs Video’s


100’s Of Grow Guides  


Hash A- Z


Cannabis Legal Info, Drug 
Lawyers, State, Federal Laws, 
State  & Supreme Court Rulings


POW’s Of The MMJ War!


Other Marijuana Websites 
Reciprocal Link Exchange


Medical Marijuana Studies, 
Research Report’s, Medical
Cannabis Clinic Study’s


Parody’s & Cartoons  
When We All Need A Good Laugh!  


Avoiding Online MOM Scammers
Newly Re-Updated Info!


The Politics Of Contraband 
Medical Marijuana In The Mail?


The Hall Of Shame Section
The Online MOM Scammers 


Online MOM Providers Ads


Politicians & Voters Rights


Medical Marijuana, Strains 


The OG  Marijuana Strain Guide


800+ FAQ Growing Questions


Patients Spiritual Guidance,
Free Online Crisis Help Center


Online Marijuana Seed Banks


Maximum Security Section 
      Just Updated!    


Traveling Tips, Guides, B & B’s


Vaporizers A To Z


Online Pot Video’s & Movies


Please Visit Both Of Our Sister Websites!

Maine Patients Coalition.org

The Reefer Madness Teaching Museum.org 

Listen Right Here Online! 
To Original 1930-1950’s
Reefer Madness Propaganda 
Radio Shows And Programs
Before TV There Were 
"Radio Stars"





Legal Disclaimer

Guest Book

Translate Text or Web Page Go To:
Language Tools Google Translations

Article Submissions &  News
Reports Are Always Gladly
Accepted Here.


No part of this site maybe used or
reproduced in whole or in part
without the written consent of the
Copyright Owner

1999-2013 Copyright
? All rights reserved

OnlinePot assumes no legal liability for any products, or information or  
news posted, services offered,  Or
any contests or give away’s offered.




GrowFAQ :

ChristianKungFu – Salts, E.C. and Leeching

  Added by: snoofer    Viewed: 606 times   Rated by 5 users: 8.00/10
Salts, E.C. and Leeching

With the use of chemical or salt ferts, its important to understand the properties of leeching. For a detailed perspective, do some reading on ion exchange between nutrients and the soil medium. Helps to understand salinity too. Borders, Barnes and Noble have good books.

Basically, some soil components have a high CATION EXCHANGE CAPACITY which allows higher levels of nutrients to adhere to soil particles until dissolved in water for plant uptake. Its kinda like long term storage for nutrients. This is great for slow release or low concentration organics. Or if you water every couple days but only fert every couple weeks.

In this thread, I will focus on underlying strategy OG high dosage-rapid release liquid fertilizers. With these ferts, if you aren?t careful, the salt content can get very high. Even more so if you have low humidity and high evaporation rate. So it would be much safer to use soil components with LOW cation exchange capacity. That simply means that extra nutrients wouldn’t be stored as well by the soil…they would just leech out…this would prevent salt buildup (which also limits water uptake) and toxicity which is easy to do with concentrated liquid ferts.

This salt index is a rough barometer of a fertilizer’s potential to prevent water absorption from the soil by plant roots….this is in comparison to the potential of an equal weight of Sodium Nitrate, which is therefore given a value of 100. Obviously, a high index has greater chance of freaking your plants! Sodium Nitrate is pretty risky, so if a fert has a rating OVER 100…ya better be darn sure you know what you’re doing 😉

These ferts don’t just inhibit water uptake…they actually create a kind of reverse osmosis (i think that’s the right term) where water is drawn OUT of the roots!

In general, if you have a fert with a index over 25, be sure to dilute with water…DO NOT apply such ferts right into soil.
Here are a few common ones…I’ll see if I can come up with a better list and edit later.

Potassium Chloride-116
Ammonium Nitrate -105
Sodium Nitrate -100
Potassium Nitrate-74
Ammonium Sulfate 69
Calcium Nitrate-53
Potassium Sulphate-46

I hope I explained that ok.
What’s the point? Many growers add Perlite or vermiculite to soil for greater drainage and aeration. USE PERLITE! It has a LOW CEC around 2.0, while vermiculite has anywhere between 85-150!!! In other words, Perlite doesn’t ‘hold on’ to ionic elements….vermiculite ‘clings’ to them! With Perlite, if you only water once a week or use light doses…you are less likely to accumulate salts leading to toxicity..

This is also key if you want to reuse soil between grows without burning the heck out of seedlings. Usually after a harvest, the soil is LOADED with salts and isn’t appropriate for introduction of a newly germinated seedling. Perlite allows a greater capacity for leeching the soil so that it is mild enough to take seedlings.

This is also why you should also leech a plant for the last 2 weeks…no nutes. The plant will use up the majority of nutes in tissues and root area. That way, you have a plant free of excess chemicals when harvested. Much smoother, cleaner, better tasting final product. This is especially important in the case of Nitrogen as it creates a poisonous gas when oxidated….AND it forces the plant to burn at a higher temp which destroys much of the THC before inhaled.

The E.C. value measures the salinity of soil by measuring its conductivity. You want an E.C. under 2.0…..anything around 4.0 needs immediate leeching. There are devices for measuring…honestly, I haven?t bought one because I am pretty comfortable with this….but if you experiment may be worth a look!

Despite my natural aversion for ppm measurement, it would be a good idea when mixing ferts as a beginner. Check your nursery or Home Depot. I’ve F-ed up a plant or two in my day, always because I THOUGHT I was more accurate with eye measurement than I really was!

  Last modified: 15:19 – Nov 17, 2002  
Quicklink:  http://overgrow.com/growfaq/1345
GrowFAQ © 2000-2004 Overgrow
faq:1345 “ChristianKungFu – Salts, E.C. and Leeching”