Can anyone explain the whole F1 generation thing? I noticed that on the Heavens Stairway seed bank website that some of their seeds talk about the f1 generation thing for example their Dutch Passion Regular Seeds section talk about the strain trance and it says "An upgrade of our former variety Skunk/Indica. With 100% Skunk seeds, it's not possible to grow fully mature outdoor plants because the seeds were selected for growing under artificial lights and greenhouse. Skunk was crossed with an early Indica, to let it mature sooner and to make the plant stronger for outdoor conditions. This is the F1 generation. It has come out as a very nice strain."