In subtropics, winter fresh market vegetable production plays a vital role in local industry and economy because it produces large revenue and creates a lot of job opportunities. Growers in the region usually apply an excess rate of fertilizers to pursue maximum yields. The residual nutrients left in the soil are prone to intensive leaching during the hot and rainy summer season because of a high and torrential rainfall occurring often in the subtropics. Summer cover crops growing and covering the land during the rainy season can conserve soil and water, scavenge residual nutrients, and provide them to cash crops after incorporated into the soil before the winter and decomposed during the vegetable growth period, which not only can improve vegetable yields, but also can reduce fertilizer input, decrease costs, and reduce the risk of surface water body eutrophication. In addition, reducing irrigation, applying composts or other soil amendments for vegetable production, can reduce soil runoff and nutrient leaching, increase nutrient retention, and improve soil fertility and vegetable yields. Therefore, the cropping systems developed in this region have shown a promising potential to act as an effective approach for local BMP strategy and improve the development of sustainable agriculture in the subtropics.