I swap moms on each cycle. I grow a plant until its big enough to clone off, take cuttings and flip the mom, raise her children, take cuttings and flip the mom, I'm just finishing off a Bubble Bomb line I've had about 2 years now. I found a GSC that I'm going to run like that replacing the BB.......I take 2-3 cuttings off any I think I may like, grow out the moms...if I like I'll keep for a while...... if not...as in The Platinum OG ( nice big beautiful plant with huge buds, but all air ) I've grown out a few times its getting dumped in favor of ??? this next run of stuff maybe...I buy seeds so I don't have to take care of the moms. Also, I get a lot of variety by where with clones until you're ready to start something new from seed ... you're stock with the strains in my mom collection.