How fast does kelp grow?

Could you please enlighten me on the growth rate of kelp? I'm fascinated by its ability to thrive in aquatic environments and would like to know how quickly it multiplies or expands. Does it grow rapidly or does it take its time? Is there a specific factor that affects its growth rate, such as water temperature, salinity, or light exposure? I'm eager to learn more about this fascinating seaweed and its growth patterns.