Four test plot programs were carried out for 3 species (Thalassia testudinum, Halodule wrightii, and Syringodium filiforme)and 3 tech-niques in Biscayne Bay, Florida over 22 years.In Laguna Madre,Texas, one test plot program with 2 species (Halodule wrightii and Halophila species),and 2 techniques were used. The result of test plot programs were used for larger scale restorations from 2 to 75 acres. The results of the larger scale plantings are judged by the investigator to have increased survival by the plantings. 1.) Some desirable sites to restore were shown to be beyond the photo compensation limits; 2.) Other barren sites were too energetic for any of the techniques to allow the development of transplant units; 3.) Some techniques originally preferred for abundance of specimens or ease of transport were not highly useful at necessary sites when tested; 4.) Some species, which would have been acceptable by the permitting agency or investigating scientist, did not demonstrate high survival. The three test plot studies in Biscayne Bay were carried out in 1976, 1982-2000. Test plots led to 6 larger plantings from 1.5 to 35 acres. The results led to separation of variables such as species, technique, site, depth, energy regime. The results of the larger scale planting were from 60 to 92% successful and led to large areas in and around the restored areas growing dense over short and long term. However, a gale-force winter storm at the 35-acre site 5 months after planting resulted in a one-third reduction in planted units. The Laguna Madre Texas sites led to a 75-acre planting. The best techniques and species were utilized as well as having a clear concept of photo-compensation for depth which differed from that in the literature. Over 70% survival occurred despite a Hurricane and tornados which lowered the survival rates.

Key words: Biscayne Bay Fl, Halodule Syringodium, Laguna Madre TX, restoration, seagrass, Thalassia Halophila