never take clones off a seed ling less than 5 weeks old,, its not geneticly mature,, you wont get all the plant can be until its mature,, i veg all seedlings 6 weeks minimum,, clones are different, the clone is the genetic age of the plant it was taken from.. so if u take clones off a 6 week old mother once its rooted u can take clones as soon as u want as its geneticly mature... i cloned under domes for many years w/ great success,, but i would recomend the clone king to anybody new to cloning,, the clone king roots plants in half the time it takes in a dome,, no misting, no maintinance, cut,dip,trim leaves, put in clone collars, insert, leave alone for 7- 10 days 100% success every time...after using the clone king,, i would never go back to dome trays,, plants root faster so less stress, more vigor, once rooted and put in pots or rock wool, medium, roots establish quick,, you can see when the plants have established roots, once rooted they grow very quickly..