Good afternoon Ken, I hope you re having a great day. Beginning your whole cannabis grow adventure is the germination of your seeds. The branches should be at roughly the same level, not exceeding 10 inches in height.  Source: <a href=https://elitetransparent.com/2013/06/management-weed-seeds-now-for-easier-spring/>https://elitetransparent.com/2013/06/management-weed-seeds-now-for-easier-spring/</a>