The objectives of this project were to evaluate candidate grass, sedge, legume and other forb species native to the northern Interior of British Columbia, develop methods for enhanced seed production while maintaining genetic variability, and determine appropriate seed mixtures, densities and soil amendments for revegetating roadsides, landings and other industrial disturbances. In meeting these objectives, knowledge on how to grow and use native plant seed has been acquired, and an embryonic native seed industry has has been developed in northern B.C. Results have been summarized in various posters, technical reports, M.Sc. theses, a manual, and linked web pages (see links on left).

   
Of 45 species evaluated, 31 were assessed in detail; their range, ecology, propagation and use are described on associated web pages, and in a spiral bound hard-copy colour manual, available for purchase. Growing accessions from diverse locations in cultivation results in uneven ripening, which poses challenges for harvesting. Although this unevenness confirms that some level of genetic diversity is being maintained, some diversity is lost through unintentional selection as well. Weed control is the biggest challenge to cultivating native plants for seed production! Plant longevity and seed yields have been monitored in seed production plots for 5 years.

Mixtures consisting of species with different statures, growth forms, rates of germination, soil preferences, drought tolerances, growth rates, etc. can be devised to match site conditions where revegetation is needed. Field trials have indicated that very successful cover establishment using native plant mixtures can be achieved if disturbed soil is promptly sown. Our research also indicates that a modest amount of commercial fertilizer can significantly increase the rate of cover build-up, which generally achieves maximum levels two growing seasons after sowing. High densities of native plant seeds can also deter establishment by exotic plant species. Shifts in the species composition of constructed native plant communities continue to be followed, with an emphasis on testing their ability to deter exotics while facilitating the recovery of indigenous trees, shrubs, and other non-sown native plant species.

This research and development project was conducted by Symbios Research & Restoration, with major support provided by Forest Renewal B.C. (Research Program administered by Science Council of B.C., 1996-2001; Terrestrial Ecosystem Restoration Program, 2001-2002) and its replacement agency, Forestry Innovation Investment (2002-2004). Additional in-kind support was provided by Woodmere Nursery Ltd. and the Canadian Forest Service.