DAS HATTE ICH NOCH NIE -bin am feminisieren von einer eigener auto-Kreuzung

CS is not consistent. Also, if you bought a "500ppm" solution off amazon it's likely a bullshit product nowhere near 500ppm... or even 50ppm or whatever it is listed. Those holistic health colloidal silver products are not regulated and they are garbage. Making your own is probably best. A batter, some wire and a silver coin is all you need. there are various instructions you can find on the internet for that. If you have access to silver nitrate in your region, Silver Thiosulfate (STS) is a much better, more consistent route to take. Less effort appling it too. Only takes 3 applications 5 days apart starting on flip to flower as opposed to everday with CS for 10-14 days. The plant will be significantly healthier with STS too. https://drive.google.com/drive/folders/1GvDcurah5FpjZaBuJQSKtsyIP3ZFNNS0 sts instructions in that drive. Feel free to download. they keep merging - original URL for undiluted STS reaction recipe https://www.merckmillipore.com/AE/en/technical-documents/protocol/cell-culture-and-cell-culture-analysis/plant-tissue-culture/silver-thiosulfate should find silver nitrate for 2-3 dollars per gram on ebay or wherever photography chemicals are sold. Sodium thiosulfate is much cheaper. You want the "anyhydrous" type or else you need to use a 1:6 ratio instead of 1:4 in recipe. inviable pollen is possible, but i think it's more a matter of dialing in the correct concentration... I'd suggest 2.5-3 mM .. too high causes problems. Too low causes problems.