Seaweed farming in the US remains a relatively nascent industry with the vast majority of current production focused on offshore kelp farming. Land-based seaweed aquaculture has the potential to supplement production for the seafood market while expanding the suite of species cultured and reducing regulatory and permitting challenges. In order to expand the land-based seaweed aquaculture industry, there is a need for low-cost and scalable hatchery methodologies aimed for use in land-based culture systems. Here we present a novel hatchery technology, CLASH (Core-Lit Apparatus for Seaweed Hatcheries), an all-in-one affordable and modular system that can be applicable for culturing a diverse array of species in varying conditions. We have successfully utilized the CLASH system to produce cultures of bull kelp (Nereocystis luetkeana), giant kelp (Macrocystis pyrifera) and winged kelp (Alaria marginata). Future studies will determine ideal stocking densities, nutrient supplementation, and light exposure to maximize productivity for each species. Utilizing the CLASH system, we aim to work with our research and industry partners to introduce new commercially relevant species for aquaculture, create new seaweed strains for land-based farming, generate biomass for restoration projects, and scale-up for use in industry.