[przy]

Sorry for the dumb question, it has probably been discussed here before. I was wondering, I have been colonizing planets but there has been no population growth on any of them at all for a number of turns. Do I have to transplant a percentage of my existing population from the planet(s) I start out with to the new colonies for the population to start growing? Or is there something else that I am missing or doing wrong?
Thanks for any replies