While the abiotic limits of bull kelp growth at the microscopic stage are somewhat understood, there is still much to understand about how different hatchery conditions may affect the final growth and yield of seaweed farms at harvest. This experiment aimed to assess how varying light and temperature levels affect bull kelp growth both in the hatchery and on the farm. Seed string was cultured under three different temperatures (5°C, 8°C, 11°C) and 4 different light levels (constant 30 μmol photon·m-2·s-1, constant 60 μmol photon·m-2·s-1, increasing from 30 to 60 μmol photon·m-2·s-1, increasing from 20 to 60 μmol photon·m-2·s-1) for two months at the NOAA Kodiak Lab and UAF Point Lena Laboratory. We outplanted the cultured seedstring on two farms in Kodiak and Juneau to determine how exposure to different abiotic conditions in the hatchery stage affect the adult stage of kelp and harvest outputs. Hatchery stage results indicate that higher light (60 μmol photon·m-2·s-1) and temperature (11°C) conditions increase growth rates of bull kelp. On the farm, however, we witnessed a potentially beneficial effect of culturing bull kelp at low temperatures (5°C). This study provides a novel understanding of bull kelp growth and development over its entire life cycle.