The training course in “Interior and exterior plant design” aims to propose to the students of specialty “Interior and furniture design”, Master degree “Design of city environment” basic knowledge in plants morphology, ecology and biology of in-door plants as general and about the widespread ornamentals in particular. The lectures are divided in two parts: first concerning life span of the flowers, ecological factors and their influence upon the plants, grown in the interior. The second part deals with the most popular ornamentals among the ferns, conifers, mono- and dicots. Flowers with seasonal and round year ornamental appearance are discussed. Practical guides for breeding plants in the interior are also proposed. A survey of some technical problems concerning indoor plant decoration is provided. Basic information about most popular outdoor annuals for balconies and terraces is included.