Algae can grow extremely fast compared to traditional crops, with some species able to double their biomass in as little as 24 hours under ideal conditions. Growth rates depend on factors such as species, water temperature, nutrient availability, light intensity, and carbon dioxide levels. Microalgae, especially species like spirulina and chlorella, are known for their rapid reproduction and ability to form dense cultures in just a few days.
Macroalgae, like kelp, grow more slowly but can still reach several meters in length within a few months. The ability to achieve such fast growth makes algae farming appealing for producing biomass quickly, whether for food, feed, fuel, or environmental purposes. Managing environmental conditions is critical to maintaining high growth rates and preventing contamination from unwanted species.