The program evaluates herbaceous and woody plants in comparative trials, ultimately recommending the top performers to gardeners and the horticulture industry. In 2014, 950 taxa were evaluated in the Bernice E. Lavin Plant Evaluation Garden, the Green Roof Gardens, and the Rose Trial Garden. Comparative trials of herbaceous cinquefoils (Potentilla spp.) and perennial sages (Salvia nemorosa cultivars) were initiated in 2014. In all, 200 new taxa were added to existing trials, such as Baptisia, Buddleja, Coreopsis, Hibiscus, and Heliopsis. The majority of new plants were donated by nurseries and plant introduction programs. The Pullman Plant Evaluation Garden was closed in spring 2014 due to the construction of the new production facilities; 350 taxa were deaccessioned from the plant evaluation program during this period.(Updated continually).
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