It can and will burn plants.
I've been spraying a plant and it never worked. I know I made it right.
I'm looking into silver thiosulfate.
I used some STS one time but isolated the plant too soon and it died.
Found the mix on other sites. You can buy the stuff on ebay and use distilled water and a pyrex measuring cup for the water.
My little digital scale measured out the chems.
Just watch you don't get the spray on anything you don't want to turn purple.
I used the second mix from IC mag below.
Grass City
What you need to do is prepare a silver thiosulfate solution. This kills colloidal silver generators and we are looking for success the first time up... So, that in mind...
First, you need to get the supplies.. Purchase a small quantity of Silver nitrate and Sodium thiosulfate on ebay or somewhere.. (you are talkin like 20bucks total)
Prepare:
.1 Grams silver nitrate
.5 Grams sodium thiosulfate
First, mix .1g of silver nitrate into 100ml distilled water, stir for about 30 seconds.
Next, mix the .5 Grams Na2S2o3 into 100m distilled water, also stir for about 30sec-1 minute...
Next mix the solutions by pouring the Silver nitrate into the sodium thiosulfate solution while stirring..
After you are done stirring, add this to 1000ml of distilled water..
Voila! Spray your plants once at the beginning of bloom, with follow ups once each week until you see male flowers, this will work.. Some strains take some coaxing lol.....
Be sure to cover the base, you dont wanna feed them this hydroponically, I promise..
I like to do this before lights out so the light doesnt neutralize the solutions effectiveness, not sure its really an issue or not, but you get the idea.. Silver nitrate doesnt like light...
IC Mag
The 'updated' recipe calls for .7 grams of silver nitrate stirred into 40 ml (8.11 teaspoons) distilled water (part A). 2.6 grams of of sodium thiosulfate stirred into 160 ml of distilled water (part B). A is mixed into B to create the stock solution. The stock solution is then mixed into 800 ml of distilled water to create 1 liter.
The updated recipe worked much better - tons of male flowers but I was hoping to see little piles of pollen like male flowers normally do. I sprayed the plants twice, once right at the flip, the second spraying at the end of week 2. I'm wondering if I should have given them one more in between. I'm wondering if CS works any better or different than STS.