The chapter introduces the tree species planted on farmlands of the Cape Winelands as shelterbelts and focuses specifically on the growth rate and survival of newly established windbreaks. In existing windbreaks, Pinus radiata and Casuarina cunninghamiana showed the fastest growth rates, but the latter also had a strong competitive effect on orchard trees in their proximity. Both species produced considerable biomass (with associated carbon sequestration) but may grow too tall for a windbreak application within 30 years of age. In contrast, Alnus cordata displayed slower growth rates and maintained a manageable windbreak height for a longer period, with minimal competition on orchard trees in close proximity to it.