Market demand for Gracilaria verrucosa cultivation is increasing, but G. verrucosa cultivation often faces obstacles such as difficulty in obtaining quality seeds, slow growth and pest and disease attacks. This activity aims to produce quality G. verrucosa seaweed seeds that grow faster, are resistant to disease and can be available throughout the season. Production of seaweed seeds through the development of spores is carried out by isolating the part of the G . verrucosa stem that contains spores. G. verrucosa plantlets from the laboratory with an initial weight of between 8 – 15 gr/individual were rearing in tanks with a volume of 1 ton. Seaweed plantlets rearing in tanks have a daily growth rate (DGR ) of between 1.50% - 2.0%. Faster growth can be achieved when plantlets are stocked in cultivation ponds where the nutrients needed for growth are widely available. Seaweed stocked in ponds has an DGR that is in the good category, namely >3%. Plantlet survival in this activity reached 100%.