Depends on your lights and genetics. Under 46 W CFL and 80% indica genes, my self sustaining lone mother makes a clone at each new site every 2-3 weeks. I'm making clones from topping, so every clone you take means maybe 2 clones the following time from the same site. Bottom line, if done right, 1 mom under a shit ton of wattage with proper care will give you a LOT of clones. Oh.. and my mom is 6-8" tall at any given time.