Many earth structures are protected against erosion with grass cover. ‘Green’ protection is often applied in difficult conditions of water deficit - on slopes, over high per- meable layers, over drainage. Geocomposite with superabsorbent (SAP) placed in the root zone could improve the situation, because of SAP ability to retain water which can be later used by plants during draught periods. Preliminary tests made in different scales (in small containers and in natural conditions) have shown that the presence of SAP geocomposite in the vegetative layer causes more intensive growth and better development of grass root system. Positive results of research on the new material usage in biotechnical slope protection was an impulse to begin investigation on its applications in agriculture, horticulture, forestry. At this stage only qualitative evaluation tests, based on observations, have been made. The investigation will be continued with a more comprehensive program and quantitative analysis of results.