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Sweetvetch (Hedysarum boreale�Nutt.), a legume native to the western USA and Canada, use in reseeding is often limited by seed production.� The lack of seed production is limited by genetic factors as well as production knowledge.� To address this we: 1) Developed a growth stage and heat unit model that designates 14 finite stages, V1 through V6 (vegetative), and R1 through R8 (reproductive stages).� This system provides meaningful designations for management of the plant for seed production, with a base temperature of 40� F (4.4� C). 2) We demonstrated that sweetvetch is tolerant to glyphosate in vegetative stages demonstrated by an LD50 value of 3,467 g ae ha-1, and GR15 values of 670 g ae ha-1. 3) Through recurrent selection seed production was been increased fourfold and seed shatter reduced relative to Timp the only available cultivar.� In addition the forage nutritive value parameters of crude protein and neutral detergent fiber have been shown to compare favorably with alfalfa and sainfoin and even exceed both at early growth stages.