Pollinating a CBD plant with a male or a reversed female and keeping the seeds is tempting, but the next generation rarely tests like the parents. Cannabinoid ratios can shift wildly and a few offspring may cross the legal THC line. The breeding basics article on https://calmcbdseeds.com explains why F2 generations spread out so much and what selection work is needed before a line settles. For most home growers, buying fresh stable seed each season is cheaper than dealing with unpredictable plants.