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Tutorial DIY STS Mixing/Using Guide for Feminized Pollen/Seeds R.C.Clarke Method as Base

Miraculous Meds

Well-known member
Spraying should be done with the lights off. I treat everything the day I induce flower so it's a good 10-12 hrs before lights on. Full strength SST fries my plants bad every time.
Amazing. I havent fried one completely. My friend who shared the concetration tip with me has reversed hundreds this way without fail. Not sure what the differences are that cause you burn and us not too.
 

Hammerhead

Disabled Farmer
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I've never seen plants not burn or damage using full strength STS, not just myself. It's why I mentioned it as it's not normal to see no damage/Burn. Even using 1:5 will burn plants on some leaves every time. This is why the recipe requires dilution. If this works for you that's great.. It doesn't work for us.
 

Miraculous Meds

Well-known member
I've never seen plants not burn or damage using full strength STS, not just myself. It's why I mentioned it as it's not normal to see no damage/Burn. Even using 1:5 will burn plants on some leaves every time. This is why the recipe requires dilution. If this works for you that's great.. It doesn't work for us.
Look at my pics. Now you have. 😆 I really haven't a clue why your getting burn and we aren't having much trouble. Are you running high par? Im only pushing 500 to 700 par in flower. I dont think its a genetic issue as I have done multiple strains. My buddy has done 100 plus. I get some leaf burn damage, but as you can see I get full reversal and tons of viable pollen off a small plant.
 

Miraculous Meds

Well-known member
Here is the leftovers from my little reversal plant. Don't judge, the girls are partying before they get pregnant.

20220814_141301.jpg
 

Hammerhead

Disabled Farmer
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Look at my pics. Now you have. 😆 I really haven't a clue why your getting burn and we aren't having much trouble. Are you running high par? Im only pushing 500 to 700 par in flower. I dont think its a genetic issue as I have done multiple strains. My buddy has done 100 plus. I get some leaf burn damage, but as you can see I get full reversal and tons of viable pollen off a small plant.

As I said its not just me. This is a well known problem if your mix is too strong. I've seen it happen countless times by many. It was never intended to be used at full strength as it will damage plants. It's why for the last 40+ years dilution is always required. If your using the standard STS mix it should be diluted to prevent damage. This hasn't changed since STS has been used to make fem pollen. I can't say it any other way.

The standard STS Recipe is 1:9. Only the dilution ratio gets adjusted. The closer we get to full strength the more damage there will be.

.5g Silver 500mls RO

2.5g Sodium Anhydrous 500mls RO ---or ...3.9g Pentahydrate

7:1 mix.... 100mls Stock solution into 700mls RO..

Good luck
HHG
 

Miraculous Meds

Well-known member
As I said its not just me. This is a well known problem if your mix is too strong. I've seen it happen countless times by many. It was never intended to be used at full strength as it will damage plants. It's why for the last 40+ years dilution is always required. If your using the standard STS mix it should be diluted to prevent damage. This hasn't changed since STS has been used to make fem pollen. I can't say it any other way.

The standard STS Recipe is 1:9. Only the dilution ratio gets adjusted. The closer we get to full strength the more damage there will be.

.5g Silver 500mls RO

2.5g Sodium Anhydrous 500mls RO ---or ...3.9g Pentahydrate

7:1 mix.... 100mls Stock solution into 700mls RO..

Good luck
HHG
I'm just sharing my experience. You have seen my results. I have seen my peers results with it. It works extremely well, plain and simple. My friend and I use pentahydrate, possibly thats a factor. Honestly, I personally don't need to know the scientific reason this is happening to appreciate the positive results, except for being able to help others achieve the same results. But if I can share it and it helps others have the same positive result, I am happy to have helped a little. I'm not trying to say it works for everybody, but it works well for us. Thats the reason I'm taking time out of my day to share.

I understand many others report burns, but also at many different concentrations. If you want, try the full strength solution, making sure the plants dry and aren't in extreme light intensity. My plants dropped tons of pollen from small solo cup to 1/2 gal pots. I made thousands of fem seeds from small plants. Seed set was completely full on most varieties.
 

hambre

Member
So.....

Healthy plant and:
  • Irrigated and not needing water
  • Maybe Pentahydrate related
  • Non-intense lighting till dry
Yes?
Hi, I am not that experienced on STS, I know when you apply foliar treatments should be with lights off (the main ones, obviously), plants irrigated and the pentahydrate don`t have a clue. What happens usually is people don`t irrigate before lights off because they think it will rot the roots (bear with my english, please), but, I, to mae an example, grow in full coco and it is almost impossible to over irrigate, and definitely NEED to irrigate before lights off to not let the coco dry over "night", so I don`t have that problem. If you run rockwool it will be the same case, in my opinion, but peat isn`t. Peat retains more water than coco coir and rockwool, same with soil, and you only have to take care it is enough humidity.
Remember, this is opinion based on my experience, but I know for a fact that if the plant doesn`t have enough water on the root zone and you spray ont he leaves, the plant will absorb the water along with the product you are applying, and definitely you don`t want that with STS or acaricides/funguicides etc which action is by contact, slowly. I don`t remember exactly the mechanism, if I found the study I will let it drop here, if someone can bring some light on this would be great.

Sorry for the testament.
 

hambre

Member
I found this study on my favorites https://jsas.journals.ekb.eg/article_3058_d483bf6f9f781ecbf2492da05416fa9d.pdf in which they study foliar apps of salicylic and ascorbic acid, having on mind the irrigation intervals. It is very short, but opening, it talks about the water stress and how can affect the outcome of our grows. I love it because there is a good remark on synthetic and organic fertilizers, and I quote: "Photosynthesis and the acquisition of mineral ions from the soil are so interdependent, however, that this distinction between organic and inorganic nutrition is more a matter of convenience than real."
So it covers a lot of topics, I love those ind of studies, even if I can`t understand them fully. Once again, I apologize for the extent of my words and maybe it is a little off-topic on this thread, I just felt it has something to do with the things we were discussing.
 

Douglas.Curtis

Autistic Diplomat in Training
I forgot to mention, I now dish soap works fine as surfactant, but they are cationic, you may want to use a non-ionic surfactant to spray leaves, cationic surfactants can be phytotoxic. Just to add a tip.
Sounds like a very likely explanation, ty so much for that observation. :)

Those who burned their plants with full strength, not through intense light before completely dry, what surfactant did you use?
 
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