Cannabis Feminized Seed Spray

Tiresias Mist Feminized Seed Spray?? Any DGC use this? So, I came across this spray on Youtube watching a guy claim he never has to buy seeds again and for me being an autoflower grower I was Cannabinology Silver Thiosulfate Spray (STS Spray) Kits for home growers and commercial cultivators alike. Easily make your own feminized seeds using Cannabinology Silver Thiosulfate spray (STS spray) today!

Tiresias Mist Feminized Seed Spray?? Any DGC use this?

So, I came across this spray on Youtube watching a guy claim he never has to buy seeds again and for me being an autoflower grower I was wondering if anyone has used this before? Is this shit safe? Scotty was just saying about how the downside to Autos is that you cant clone them. Its a one and done.Thinking about buying this off Amazon for next grow. I would probably use it on 1 plant separated from the others in a 2x2x4 grow tent. I have never seeded a plant before( on purpose at least) I have had a few hermies from Fastbuds seed bank (Blue Dream Matic) but didn’t let it grow out to maturity. I have found a few favorite strains so far and wonder if i use those last beans I have to try and get more seeds.
Anyway its just an idea. I haven’t heard of this before and not sure what to believe unless truly tested. Would love to hear some input. It will be at least 3 months before I decide to get this. I want to finish this harvest I have now before experimenting with making seeds.
Thanks guys and Stay Irie!

Tiresias Mist:
Tiresias Mist is a new spray that enables growers to create feminized seeds. The product is owned and distributed by Phoenician Nutrients, LLC, which is based out of Scottsdale, AZ. Tiresias Mist was the result of research with the goal in mind of standardizing a treatment method to produce feminized seeds and responsibly cross-pollinate. Currently, growers do not have a product that is recognized and tested to grow clone seeds of the host plant(s). Currently, there are a number of theories, practices, and products that are used with very mixed results and the products are not intended to be used on plants. Tiresias Mist is safe for plants, humans, and animals so there is no need to worry about any harmful side effects to the environment.
****Always female seeds….No more guessing involved
****No more waiting weeks for overseas deliveries – A tap root from a seed will produce higher yields
****Store seeds for future use and crop timing
****Easier to transport seeds versus seedlings or clones
****Become your own mad scientist by creating your own genetic strains
****Allows you to save your strain!


I tried hitting them up a while back and I couldn’t get a straight answer from anyone about wtf it’s made of.

The label says it’s made from “natural minerals” and “inert ingredients” which is basically meaningless. It also says it “contains no chemicals”… which also seems like meaningless nonsense because a “chemical” could be defined is basically any prepared substance.

I suspect it’s colloidal silver or something similar. (Which you can get cheaper from other sources.)

I’d love to hear from them and have them explain wtf it is that they are selling, but I won’t use anything from a company who won’t give me a straight answer about wtf is in their product

On a separate note… making fem seeds using a product like this is very different than cloning so this isn’t really a solution to not being able to clone autos. If you wanna take clones, grow regular seeds.

Cloning gives you a genetically identical copy, selfing or making fem seeds will still give you a lot of variation from seed to seed.

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Selfing can be a cool project and you can find some cool stuff going down that path. However, it’s important to understand you won’t get consistent plants as a result because you are combining genetics (aka breeding), not cloning.

Hey Soup you are the person to ask probably. Where is the best place to buy the silver biosulphate or whatever it is called. Is that the same as colloidal silver. How do you mix the spray for making the fem seeds. This is something I am interested in doing with a few plants I have, I have some male pollen saved but I know nothing about the father other than its a stretcher. I thought it would be safer to go this route. Should I make a post about this. I would mainly like to have the seeds to preserve the phenotype as it is from a 20 yr old seed I will never be able to aquire again I have kept these plants going a couple years but I would like to have a better way to preserve this strain and while I am at it another and start with something new.

Check out the article I posted in the comment below. I haven’t tried any of this stuff myself yet, but that article looks like a good resource. Seems like you can get both the ingredients you need to make sts on amazon.

Also, check out my other comments below about seeds and variation. Anytime you work with pollen you are gonna get some variety in the end results. If your goal is preserving a specific pheno, cloning is a much better way to do it. ✌️

Cool thanks a ton, literally after I posted that comment I reloaded the page and seen that post. Great info. Thanks

Thanks Soup! I actually was under the impression if i have nice pheno lets say Gorilla glue auto. If i self her then her seeds in return would give me the same plant with same dominant traits from the mother. I guess thats why there is pheno-hunting.. Which I dont believe is a practice with autoflowers? May be wrong. I want to give photos a try. I have those free seeds from Obsul33t Alien orange gum and a pack of alien orange Congolese. I’m just a little nervous going from autos to a photo. I do treat the auto like I would a photo. By keeping the dark cycle dark. But I game and spend alot of time in same room as the closet i grow in. I have black out curtains to where its pitch black, but hearing so many times about peiple fucking up because they left a light on the room and make it seem like a small amount of light on a dark cycle can ruin the harvest.? Maybe soon i will give these a try. Im in “Great” state of GA so outdoor is a no go.. And neighbors are nosy so I gotta keep it small and compact. Why i choose autos. Thanks again man. Sorry for the rant. A bit lit at the moment.
Stay Irie Soup!

Anytime there is “sexual reproduction” (aka pollination when we are talking about cannabis) there is going to be variations in the resulting offspring.

Seedlings from similar parents may contain some similar traits, but there will always be some differences.

Cloning is actually “asexual reproduction” which is a completely different type of process. Cloning results in genetically IDENTICAL copies of the original.

I grow photoperiod plants in a tent in my office and I haven’t had any issues. I’m in the room working a lot and often have the office lights on during the tent’s dark cycle and I haven’t had any issues.

there are some genetics that are really prone to herming due to light leaks, but generally I think most strains are able to handle minor light leaks much better than most people think.

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You can also greatly reduce your risk by choosing solid genetics, and avoiding strains with known hermaphroditism in the family.

a lot of the “hype” popular genetics like strains related to cookies, chems and gorilla glue are all much more sensitive because those strains literally originated from herming plants. When you have a herm in the family tree, those seeds are MUCH more likely to carry those same traits.

Hey Rasta It’s actually silver thiosulfate. But not worth the money as there is only enough in there to spray one branch of a plant for the time it takes to get pollen. I used it once and it worked but for the price you can make a bunch of it buying the raw materials and distilled water and mix your own. Keeping it in the fridge preserves it for a month There are a few articles on it on the web but you have to play with spray intervals on certain strains or you will wind up with sacks inside the bud making it hard to get out. Autos are more tricky than photos because you have to know exactly when they will start flowering and you have to find the right time to start spraying to get one looking as male as possible and collect the pollen then start another run to use that pollen on when buds are formed enough to get a good seed count.

I could be wrong, but I don’t think this product is Silver thiosulfate.

My understanding is that sts needs to be stored in two separate bottles and has to be refrigerated. This product is one bottle and I think it’s typically not refrigerated.

Also I really don’t think they would say it contains no chemicals if it’s STS, since STS is most definitely a chemical.

I think it’s more likely this product is some form of collodial silver. That would explain the single bottle, lack of refrigeration, and their claim that it is “natural mineral extract”

Good to know. When and if it comes around to trying this method out I will definitely reach out for some info on the silver thiosulfate. If understand right, This stuff which is Silver thiosulfate is how you would “self” a plant to produce seeds without having to introduce pollen? So, making a female plant herm? isnt there ways to do that naturally without chemicals? OR does the chemical method give you higher rate of feminized seeds and latter gives regular seeds?? still learning guys thanks for bearing with me.

Selfing still involves pollen, you are just getting the pollen from the same plant you are pollenating.

Also, Using a chemical to induce a female plant to produce pollen is technically very different than a herming plant that produces pollen.

A herming plant produces pollen because it carries genes that cause it to grow pollen sacks. Any resulting seeds are very likely to cary the same genes and have the same issues.

A plant treated with sts produces pollen because it’s hormones are being chemically manipulated, not because of genetics.

With herms you get pollen sacks because it’s hardcoded into the genetics, with sts you get pollen because you are manipulating the plant by using chemicals to block hormones.

On a slightly different note…

I am actually mildly interested in getting my hands on a little STS….

I’ve never actually used it in any of my own projects, but I’ve got some special ladies I’m working with right now so it’s something I’m thinking about trying.

If anyone in the crew has a hookup or knows a good reliable source where I can cheaply acquire some STS for a small project… get in touch!

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Cannabis Feminized Seed Spray

​The Cannabinology Silver Thiosulfate Spray Kit was designed with the grower in mind. These kits contains everything you need to sex reverse female cannabis plants and produce feminized seeds at home or in a commercial setting.

We offer a range of sizes from a small home STS spray kit to larger commercial STS spray kits. The small Home STS Spray Kit contains enough Silver Thiosulfate (STS) spray to sex reverse 1 small plant; perfect to make a few hundred or even a few thousand seeds as a home grower! The commercial STS Spray Kit can produce many small sex reversed plants or 1 large sex reversed plant to produce many thousands of seeds.

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What is Silver
Thiosulfate (STS)?

STS stands for Silver Thiosulfate. When applied to plants such as Cannabis sativa , Silver Thiosulfate (STS) acts as an ethylene blocker. Ethylene can be considered the “female” hormone in Cannabis plants. By preventing the action of ethylene you can force a female Cannabis plant to develop and produce male-type flowers, pollen sacks, and pollen. Since this pollen was made by a female, the pollen can be used to pollinate another female plant creating feminized seeds which will be 100% female.

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How does Silver Thiosulfate (STS) work?

STS is a compound that blocks the action of ethylene, the “female hormone” in many species of plants. When you apply the Silver Thiosulfate (STS) spray, the plants absorb the compound through their leaves or flowers where it blocks the action of ethylene. This causes the plant to grow and develop as if it were male. As the flowers develop, a plant treated with Silver Thiosulfate (STS) will develop male type flowers, pollen sacks and pollen rather than calyxes and pistils. The pollen that is released will carry only the genes for female plants.

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How do I prepare Silver Thiosulfate (STS) spray?

Our Silver Thiosulfate (STS) spray is easy to prepare, has extended shelf life, and provides consistent repeatable results. All you need to do is add water and a few drops of soap to the Cannabinology Silver Thiosulfate (STS) spray bottle and you’re ready to begin!

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How do I use Silver Thiosulfate (STS) spray?

Here is a brief overview of the steps to use Silver Thiosulfate (STS) spray to sex reverse female cannabis plants.

Step 1: Add water then a small amount of soap to the Silver Thiosulfate (STS) Spray bottle.

Step 2: Apply Silver Thiosulfate (STS) Spray to female plants beginning on day 1 of flower. Repeat the Silver Thiosulfate (STS) spray every 5 days until day 20 – 30 depending on the variety.

Step 3: Pollinate non-sex reversed female.

For more detailed information and tips on using Silver Thiosulfate (STS) more effectively see the instructions included in the Cannabinology STS Spray Kits

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Does using Silver Thiosulfate (STS) spray cause hermaphrodites?

The short answer is no.

The long answer is, it depends on the genetics of the seed mother and the pollen donor. Female cannabis plants sprayed with STS remain genetically female and don’t take on any extra hermaphroditic traits from being sprayed with Silver Thiosulfate (STS) spray, but if either of the parents have hermaphroditic traits then it is possible to have hermaphrodites in the offspring. The chance of hermaphrodites is also increased if you are selfing, using the same plant or the same cut as both the seed mother and the pollen donor. Regardless, the hermaphroditic traits come from the genetics of the parents not the process of sex reversing using Silver Thiosulfate (STS) spray.