We present a procedure for selecting and verifying the optimal location for establishing a new population of the relict species Salix lapponum in eastern Poland. We aimed to demonstrate the importance of an approach combining the results of multifaceted analyses with the subjective experience and judgment of a practitioner. We began by selecting 30 historically known sites of the species and chose the optimal one for the reintroduction process. The reintroduction of S. lapponum in the site ultimately chosen proved satisfactory with respect to plant survival. This was the first trial of this type conducted in peat bogs situated in eastern Poland. We believe that in addition to sound knowledge of the biology and ecology of the species, current data on the habitat conditions in the area selected for transplantation are necessary as well. Suitable statistical analyses should be applied, but their value will increase with the amount and variety of available data on the habitat at the initial stage of selection. The experience and intuition of a practitioner making the final choice of reintroduction site may prove to be crucial, so its importance should be emphasized.