Growth

Growth is the primary way to increase.

Generation
Every Colony has a natural of 0.01 per turn. Improvements, such as the $$ and $$, are the most important sources of. also impacts. Above 50% provides a positive bonus (up to a maximum of +50%), otherwise the bonus is negative.

Other sources of include:
 * Certain Planet types
 * Certain Colonization events and Galactic events
 * Certain Starbase modules
 * Technologies including, , and
 * The Xenophobic and Prolific abilities
 * The Fertile trait
 * In, certain Governments, Galactic events and Crisis events