Sustainable cities are ecologically planned and require obtaining, interpretation and using all the ecological data with ecological land planning principles which called urban landscape planning. Geological and geophysical data, climatic data with forecasting a long time, soil types, all biota including flora and fauna, recent and future population, land use types in urban site and surrounding regions, environmental pollution sources and relating works of environmental engineers are implements to use with ecological urban planning principles and methods. Particularly open and green areas of all kinds of urban space with selection of optimum ground structure, the square measure, the distance among them, selection of right trees, shrubs, vines, groundcover plants, hedges, perennials and annuals, geophytes, etc. secure viable cities by contribution of landscape architects to urban planning. Without ecological planning there is no possibility to reach sustainable city concept.