Mostly, the Negav desert is barren. In the narrow Wadis, there is a good chance of locating low bushes and some tall Broom bushes. However, a broad shade green leaf Acacia is an absolute desert treasure! A full chain of food succeeds this tree. From ants to desert Haynes... The germination of Acacia seeds is very scarce but we can do something to improve chances and Nachal Gevanim is a good location for this... Nachal Gevanim. Location: Negev desert.