male/female questions..etc

I have been reading many messages discussing the sex of the plants, and wanted to say that I think I might have both males and females growing together,but am not sure. I have 2 containers , one with 3 plants and the second has 5...I saw white hairs on some of the plants that have now turned to reddish brown,,,but they also seem to have seeds. There are also plants with pollen sacks. They all have a wonderful smell and get me high just fine.....I have only used sunlight to grow them, and they are in continuous feeding soil. They are about 2 ft high and bushy from topping... could my plants be hermies? How can I be sure? I dont have pics. all of them get me high just fine...even the ones with no hairs.Also, can you keep a plant alive indefinitely and just live off topping or do they have to be harvested eventually? I have had them for about 5 months...any info from anyone would help a lot..thanks,

js