A b s t r a c t : The recent demand for quality foods and the necessity to develop low-input, envir o n m e n t a l l y friendly agronomic techniques has encouraged the use of cover cropping in vineyards, olive groves, and tree plantations for both fruit and timber. Research has indicated both positive and negative effects of cover crops when used with tree cultivation. Several cover crop species have been recognized as suitable for varying climates, soils and usage. Sward management was conducted in dif f e rent climates and agronomic conditions with subsequent contrasting results. These results will help to identify the most suitable cover crop for the various environments and tree species.