how generate Seeds

I’ve been down this road with fantastic results. STS is the best method to use in my experience. Some varieties are a little more resistant than others, but ultimately every plant I’ve sprayed with it gave me male flowers. You can then collect the pollin to cross, or allow the plant self pollinate. You need not spray the entire plant either. Just a branch with good light will work. Then cut the branch off when finished with it. This is great for breeding your own cross or duplicating what you already have. What it will not work on is your F1 seeds. They will reproduce but the offspring will not be what the mother was.

STS is easy to make. Don't by the pre-packaged stuff. Buy silver nitrate and anhydrous sodium thiosulfate off ebay. Last i bought some the silver nitrate is about 2 USD per gram. You use very little at a time so 5grams or 10 grams will last many years. Since it comes in a dry form, it stores even longer. Sigma Aldritch recipe is accurate and based on molar ratios of a balanced equation. If that is greek, just know it's the right ratios/proportions to mix. https://www.sigmaaldrich.com/US/en/technical-documents/protocol/cell-culture-and-cell-culture-analysis/plant-tissue-culture/silver-thiosulfate *** - This recipe must be diluted further. Mix as instructed because it is important for the double replacement reaction to take place efficiently. Dilute further with distilled water 1:5.67 for a 3mM concentration and 1:9 for a 2mM concentration. So you add 10mL of the solution from the recipe then 90mL of distilled water or 56.7mL, etc. Make sure you use distilled water. Do not use any metal utensils or trays etc. A "milligram" scale is necessary to weight out smaller batches. If you want to make 250mL of solution, it simply won't be done accurately with a common ".01 +/-.03" digital scale. A 500mL solution will be +/-10% error with this scale and about as small of a batch you can make. Still WAY cheaper than buying it and you will still have plenty to mix up for years to come, but if only spraying one plant it'll be a total waste. 3 applications. Flower day 1, 5 and 10. Spray every surface. FYI you do not need large plants to make ~1000 seeds. I got 1200 from a 30-40g plant (dried weight) I'd guess you need about 100mL per small plant like that? maybe 75mL? So even the 250mL batch will have some waste. screw CS. the stuff you buy on amazon is a bunch of bullshit lies and never has the ppm it claims. if you go that route learn to make your own with a silver coin and a battery. you have to apply that every day for 10-14 days.. pain in the ass. Makes the plant sickly as fuck too. STS sprayed plants retain their health. don't overdo it on concentration. I had near 100% conversion (virtually all pollen sacs on plant) when i accidentally sprayed with 10-20mM. forgot to dilute and couldn't fill up my spray bottle enough etc... Thought it was fine until harvest and zero seeds resulted. Stick to 2-3mM concentration. if you can follow the simple instructions form the link above, do not be afraid to use STS. It's simple. you just stir to dissolve, then slowly add one to the other as you stir. then dilute. Simple as that. The silver nitrate is corrosive and will permanently stainthings. So don't do this on your kitchen table unless you put something down to protect it. I wouldn't pour excess down the drain either, unless significantly diluted. No reason to corrode your pipes. LOL dump excess in the road or back woods etc.

Try "Pev Grow" in Spain, they willl send seeds nearly everywhere in the World with stealth packaging. Mandala Seeds, also in Spain, are another World-wide sender. Much easioer than trying to "reverse" a female plant to make pollen. Sodium thiosulphate works extremely well and is easy to make if you have the right equipment and you can get the chemicals into your country........ebay is one source to get them from............there are plenty of "recipes" on the net and in my experience, STS is much more reliable than trying to use colloidal silver. You will need a sacrifical plant to reverse as you should not consume anything from a treated plant. Reverse a female, harvest the pollen and then use it on your next crop...........seeds take 4-6 weeks to fully mature and if you try and pollinate plants that were started at the same time as your sacrifical pollen donor, it will be too old to produce many seeds and too old to grow them long enough to mature properly. You need to pollinate a plant right at the beginning of flowering, when all the pistils are still white for maximum results. Once you have made seeds, they will be quite variable in their genetics, you will then need to repeat the whole procedure a few times with selected specimens to develop a true breeding line of seeds............maybe 3-4 back crosses at least to stabilise the genetic traits you are looking for. Considering all this, unless you have a lot of time and space, buying seeds is much, much easier.