The art and knowledge of landscape architecture spans many disciplines, while landscape design in itself is an expression and treasury of cultural values and beliefs, natural and visual impacts. In the case of ecological and environmental paradigms and knowledge,the designed landscape faces particular challenges to environmental design quality and landscape identity. This threat is even more significant for a country like Iran with considerable ecological diversity and an ancient civilized culture. This paper addresses the potential contribution of both of Iranian tacit knowledge of landscaping and landscape ecology to manage, or at least help alleviate, some of these issues. The key questions are: ∑What new challenges are there in landscape design related to landscape ecology? ∑What concepts and values can help us create a fit and beautiful landscape with environmental benefits, while making use of vernacular potentials? ∑How can various aspects of knowledge influence the way we design, construct and manage landscape and develop urban and rural landscapes architecture? In an effort to answer these questions, we hope to identify measures for appropriate choice of vegetation; appropriate grading; use of barriers; and the promotion of environmental archetypes, native methods and ecological patterns. In order to cover these delicate discussions, the author presents two main concepts tacit environmental knowledge and the oasis paradigm.