underground

Making your own STS feminization mixture for a few bucks

11 posts in this topic

Making your own STS feminization mixture for a few bucks

You need:

Silver nitrate - AgNO3 (only expensive part of STS) – can be found on ebay or chem shop, cost is about 30$/10g - 10g will last for 12l of foliar spray!!!

Sodium Thiosulfate or Sodium thiosulfate pentahydrate - Na2S2O3 or Na2S2O3-5H2O - can be found on ebay or chem shop.

Distilled or RO water, kitchen or medical gloves, syringes, plastic bottles.

Mixture A

Take your scale – you need 1.7g of AgNO3use gloves and be carefull cause AgNO3 will leave dark black marks almost impossible to clean on your skin. But don't worry - they will stay for a few months – new skin new look ;)

Add 1.7g of AgNO3 to 100ml of distilled water. Dont use any metal objects – only plastic or glass! This is mixture A – it should be put in dark place [no direct light!] or in the dark plastic bottle.

Mixture B

6.32g of Na2S2O3 or 9.92g of Na2S2O3-5H2O - add it to 400ml of water. It doesnt have to be distilled water but it is better to use it. You can add 6.3 or 9.9 if you have 0,0 scale. This is mixture B. You dont have to protect it from light.

Mixture A and mixture B can be stored for a long time in a dark place.

Mixture STS

Now we can make STS: you take 5ml of mixture A and 20 ml of mixture B – slowly stiring you add A to B and have mixture STS. STS is not as stable as mixture A and B alone and should be use as fast as possible. It is better to make amonut of STS you use in one foliar spraying.

Now we have STS so we can use 1:2, 1:3 or 1:4 concentration. It means you add your mixed STS to water. Concentration means: 1:2 – 1 part STS 2 parts water [25ml STS + 50ml water], 1:3 [25ml STS + 75ml water] etc. Now you can use this mixture for foliar spraying.

It is best to start from 1:3 concentration – if nothing happens you can use stronger concentrations. All depends on experience, strain and other factors. Some strains are easy to herm – some not.

It is best to use STS as soon as flowering starts. Male bananas popping from female flowers will give you feminized pollen!

Peace brothers!

3 people like this

Share this post


Link to post
Share on other sites

here you can download PDF with recipe

http://www.phytotechlab.com/pdf/stssolution.pdf

It is best known ( as far as i know ) way for fem seeds

yea - it is same recipe for STS - mine is wroted in more common language :D

you can choos only 1 branch to be sprayed and only it will be hermed

this is good way to have some S1 seeds for nxt grow

1 person likes this

Share this post


Link to post
Share on other sites

Thanks for sharing man i know some members will be very happy to see this recip, and who knows i might us it someday too ;)

cheers

Share this post


Link to post
Share on other sites

Thanks personaly i dont use chemical methods simpley stressing ur palnts can and often dose produce hermi growth. My preffered method is light manipulation and starvation techniques

Share this post


Link to post
Share on other sites

No chemicals thanks though im stritly veganic grow if its plant derived ill try but not otherwise nature dose it best

Share this post


Link to post
Share on other sites

Thanks personaly i dont use chemical methods simpley stressing ur palnts can and often dose produce hermi growth. My preffered method is light manipulation and starvation techniques

No offense mate, but this chemical is only used for people interested in the breeding feminized seeds, you don´t will consume the plant that was treated. and if you know how to make a female plant to produce male flowers without being hermaphrodites only with light, please make it known, will help. Because from my point of view that you do only serves to tell if a plant its a true female. My best regards

Share this post


Link to post
Share on other sites

Hi to all :)

 

I can't find spraying regime/schedule for STS mixture.

Please helpe me, how often to spray and how long...

 

Thanks ;)

Share this post


Link to post
Share on other sites

Thanks for sharing this formula I have successfully make a feminized plant. ;) 

 

1 person likes this

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now

About us

Strain Hunters is a series of documentaries aimed at informing the general public about the quest for the preservation of the cannabis plant in the form of particularly vulnerable landraces originating in the poorest areas of the planet.

Cannabis, one of the most ancient plants known to man, used in every civilisation all over the world for medicinal and recreational purposes, is facing a very real threat of extinction. One day these plants could be helpful in developing better medications for the sick and the suffering. We feel it is our duty to preserve as many cannabis landraces in our genetic database, and by breeding them into other well-studied medicinal strains for the sole purpose of scientific research.

Social Network

Add us on social networks