In the present cities, in spite increasingly achievment of high-technology (the efficient systems of cleaning air, water, etc.) and facilities are served human, green area are one of deficient goods. Both of this, created and maintenance by man, and natural through we have contact with nature. In this cotext spontaneous growing vegetation appears very seldom, in the most often cases not accepted by occupants. Their diversification and occur wild, where the other plants are not growing, is underestimated value furthemore they constitute potencial of cities. Worsening conditions of city life require improvement of this situation. It is necessary to implement strategy of sustainability which were accepted by also by Poland. In this situation it ought to introduce synanthropic vegetation in green area. In this work, for example of Lublin, was introduced the analysis of possibility protect and interest the synanthropic vegetation as well as advantages of this activity.

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