How long does it take to make mature or viable seeds after pollenation?
Indicas take anywhere from 3 to 5 weeks, Sativas can take anywhere from 4 to 6. Ive harvested some as early as 2 weeks, autoflower varieties are the fastest. Few things i learned from doing it myself= PPM meter is basically worthless if your making your own CS. If it is showing 20ppm it is really much higher, those meters do not work well with CS. Never use cue tips when fertilizing your ladies, the pistils can grab onto the cotton and pull the pistils out. You can flip one branch or the whole plant, i usually flip a small branch. You can make S-1 seeds with your other seeds if you flip one branch and its much easier to deal with. I make seeds every time i get a new strain whether its one female or more. I never had a problem flipping. Tip= keep straying until the first male pollen sack opens or becomes slightly yellow. You can ease up spraying but dont stop until that male sack is ready. If you stop the males might go back into female mode, seen it happen once. The branch you flip will become slightly to moderatly stressed, this is normal. The leaves might become deformed a little, dont stop spraying.
Added= Be careful when you pollinate i always over do it. Plant becomes nothing but seed and little bud. One branch or cola is all you need for a lifetimes worth.