Does anyone here make their own feminised seeds?

TheRealDman

TheRealDman

Well-Known Member
cheeseofchud said:
can you share your technique dman?
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@cheeseofchud I use the same tech that we pioneered 17 years ago on overgrow.com (the old one, not the new knockoff). This info is readily available via google, but I'll throw you an bone.

Pro-Tip! ;)

First, a stock solution is made. It consists of two parts (A and B) that are initially mixed separately, then blended together. Part A is ALWAYS mixed into part B while stirring rapidly. Use distilled water; tap water may cause precipitates to form.

Part A: .5 gram silver nitrate stirred into 500ml distilled water. Part B: 2.5 grams sodium thiosulfate (anhydrous) stirred into 500ml distilled water. The silver nitrate dissolves within 15 seconds. The sodium thiosulfate takes 30-45 seconds to dissolve.The silver nitrate solution (A) is then mixed into the sodium thiosulfate solution (B) while stirring rapidly. The resulting blend is stock Silver Thiosulfate Solution (STS).This stock solution is then diluted at a ratio of 1:1 to make a working solution. For example, 100ml of stock STS is added to 100ml of distilled water. This is then sprayed on select female plants.

The STS working solution is sprayed on select female plants until runoff. Do the spraying over newspaper in a separate area from the flower room. You probably won't smell anything, but ventilate anyway. You now have a "F>M plant"; a female plant that will produce male flowers. After the F>M plant dries move it into 12/12 immediately. This is usually done 3-5 weeks prior to the date that the target (to be pollinated) plants will be ready to pollinate. Response times may vary slightly depending upon the strain. More specific times can be determined by trial with your own individual strains. 30-35 days seems optimum for planning purposes. A second application 2 weeks after the 1st will aid in reversing tough strains (recommended).
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cheeseofchud

Well-Known Member
maybe you would be so kind as to share your knowledge on it......thats what this thread is about,no?
you tell of lots of experience.....it would be a good gesture to share it instead of nitpicking people......you avoid lots of questions.....
 
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cheeseofchud

Well-Known Member
this is what ive always used,but i mix 1;6

STS:

I have had this text file on my hard drive and various backups for around 10 years and honestly don't remember where I got it originally. I suspect that either I copied it off of the internet or it was passed down from another grower. Now I am glad to pass it on again with my own modifications and tweaks.

The following is a safe, inexpensive, and successful method for reversing the sex of female cannabis plants. Individual plant responses may vary based upon strain, but I can verify that this process is fully effective in stimulating profuse staminate flower production.

This process can be used to:
A: create new feminized seeds from solitary prize mothers that you currently have
B: create interesting feminized-seed hybrids from different prize strains that you currently have
C: create feminized seeds for optimum outdoor use
D: accelerate the "interview" phase of cultivation, in searching for interesting new clone-mothers
E: reduce total plant numbers- great for medical users with severe plant number restrictions
F: increase variety, by helping to create stable feminized seedlines to be used as an alternative to clones

At the bottom of this post are some specific details about the chemicals used, their safety, their cost, and where to get them.

It is important to educate yourself about cannabis breeding theory and technique prior to using a method like this one.

It is also important to use basic safety precautions when mixing and handling these chemicals, so read the safety data links provided. The risk is similar to mixing and handling chemical fertilizers, and similar handling procedures are sufficient.

Remember: nothing will ever replace good genetics, and some of your bounty should always go back towards the professional cannabis breeders out there... the ones who have worked for many generations to come up with their true-breeding F1 masterpieces. Support professional breeders by buying their seeds.

-------------------------------------

Preparation of STS:
First, a stock solution is made. It consists of two parts (A and B) that are initially mixed separately, then blended together. Part A is ALWAYS mixed into part B while stirring rapidly. Use distilled water; tap water may cause precipitates to form.

Wear gloves while mixing and using these chemicals, and mix and use in a properly ventilated area. A mask will prevent the breathing of any dust, which is caustic. STS is colorless and odorless, and poses minimal health risks if used as described here. (See material safety data sheet links below). Note that silver nitrate and STS can cause brown stains upon drying, so spray over newspaper and avoid spilling.

Part A: .5 gram silver nitrate stirred into 500ml distilled water
Part B: 2.5 grams sodium thiosulfate (anhydrous) stirred into 500ml distilled water

The silver nitrate dissolves within 15 seconds. The sodium thiosulfate takes 30-45 seconds to dissolve.

The silver nitrate solution (A) is then mixed into the sodium thiosulfate solution (B) while stirring rapidly. The resulting blend is stock silver thiosulfate solution (STS).

This stock solution is then diluted at a ratio of 1:9 to make a working solution. For example, 100ml of stock STS is added to 900ml of distilled water. This is then sprayed on select female plants.

Both the stock STS and the working solution should be refrigerated after use, as well as the powdered chemicals, to avoid activity loss. Excess working solution can be safely poured down the drain after use (with ample running water) with negligible environmental impact. It's pretty cheap.

Each liter of stock STS will make ten 1-liter batches of working solution of STS. With the minimum amount of base chemicals ordered from Photographer's Formulary (see link below), this means that each 1-liter bottle of working solution STS costs less than 9 cents, and can treat 15-20 mid-sized plants. That's 200 1-liter batches of STS for $18. Note that the distilled water costs far more than the chemicals.
 
TheRealDman

TheRealDman

Well-Known Member
cheeseofchud said:
this is what ive always used,but i mix 1;6

STS:

I have had this text file on my hard drive and various backups for around 10 years and honestly don't remember where I got it originally. I suspect that either I copied it off of the internet or it was passed down from another grower. Now I am glad to pass it on again with my own modifications and tweaks.

The following is a safe, inexpensive, and successful method for reversing the sex of female cannabis plants. Individual plant responses may vary based upon strain, but I can verify that this process is fully effective in stimulating profuse staminate flower production.

This process can be used to:
A: create new feminized seeds from solitary prize mothers that you currently have
B: create interesting feminized-seed hybrids from different prize strains that you currently have
C: create feminized seeds for optimum outdoor use
D: accelerate the "interview" phase of cultivation, in searching for interesting new clone-mothers
E: reduce total plant numbers- great for medical users with severe plant number restrictions
F: increase variety, by helping to create stable feminized seedlines to be used as an alternative to clones

At the bottom of this post are some specific details about the chemicals used, their safety, their cost, and where to get them.

It is important to educate yourself about cannabis breeding theory and technique prior to using a method like this one.

It is also important to use basic safety precautions when mixing and handling these chemicals, so read the safety data links provided. The risk is similar to mixing and handling chemical fertilizers, and similar handling procedures are sufficient.

Remember: nothing will ever replace good genetics, and some of your bounty should always go back towards the professional cannabis breeders out there... the ones who have worked for many generations to come up with their true-breeding F1 masterpieces. Support professional breeders by buying their seeds.

-------------------------------------

Preparation of STS:
First, a stock solution is made. It consists of two parts (A and B) that are initially mixed separately, then blended together. Part A is ALWAYS mixed into part B while stirring rapidly. Use distilled water; tap water may cause precipitates to form.

Wear gloves while mixing and using these chemicals, and mix and use in a properly ventilated area. A mask will prevent the breathing of any dust, which is caustic. STS is colorless and odorless, and poses minimal health risks if used as described here. (See material safety data sheet links below). Note that silver nitrate and STS can cause brown stains upon drying, so spray over newspaper and avoid spilling.

Part A: .5 gram silver nitrate stirred into 500ml distilled water
Part B: 2.5 grams sodium thiosulfate (anhydrous) stirred into 500ml distilled water

The silver nitrate dissolves within 15 seconds. The sodium thiosulfate takes 30-45 seconds to dissolve.

The silver nitrate solution (A) is then mixed into the sodium thiosulfate solution (B) while stirring rapidly. The resulting blend is stock silver thiosulfate solution (STS).

This stock solution is then diluted at a ratio of 1:9 to make a working solution. For example, 100ml of stock STS is added to 900ml of distilled water. This is then sprayed on select female plants.

Both the stock STS and the working solution should be refrigerated after use, as well as the powdered chemicals, to avoid activity loss. Excess working solution can be safely poured down the drain after use (with ample running water) with negligible environmental impact. It's pretty cheap.

Each liter of stock STS will make ten 1-liter batches of working solution of STS. With the minimum amount of base chemicals ordered from Photographer's Formulary (see link below), this means that each 1-liter bottle of working solution STS costs less than 9 cents, and can treat 15-20 mid-sized plants. That's 200 1-liter batches of STS for $18. Note that the distilled water costs far more than the chemicals.
Click to expand...
You're using TheCountyMon's 1st draft. The final version is 1:1 ratio, 2 apps.
 
TheRealDman

TheRealDman

Well-Known Member
cheeseofchud said:
Remember: nothing will ever replace good genetics, and some of your bounty should always go back towards the professional cannabis breeders out there... the ones who have worked for many generations to come up with their true-breeding F1 masterpieces. Support professional breeders by buying their seeds.
Click to expand...
Ummm...you should just stop dude! You clearly don't even have a grasp on the basics of filial generations, or how they work. There is no such thing as a "true breeding F1". You should concentrate more on your garden (if you have one), and less on Interweb chest-thumping. Really, you're not impressing anyone here with this.
 
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cheeseofchud

Well-Known Member
TheRealDman said:
Ummm...you should just stop dude! You clearly don't even have a grasp on the basics of filial generations, or how they work. There is no such thing as a "true breeding F1". You should concentrate more on your garden (if you have one), and less on Interweb chest-thumping. Really, you're not impressing anyone here with this.
Click to expand...
dont put words in my mouth d!!im serious here
i just copied and pasted that tutorial for someone who asked,i didnt write it!

what is your problem?
 
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cheeseofchud

Well-Known Member
TheRealDman said:
Ummm...you should just stop dude! You clearly don't even have a grasp on the basics of filial generations, or how they work. There is no such thing as a "true breeding F1". You should concentrate more on your garden (if you have one), and less on Interweb chest-thumping. Really, you're not impressing anyone here with this.
Click to expand...
if you have such a grasp teach people,dont be an ass......
 
T

thelast1

Well-Known Member
There seems to be a lot of people who just scream, "You're doing it wrong! But I won't tell you how to do it right because I'm better than you. "

It's really disappointing to see so much hostility.
 
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