In this work, the ensilability of feeding sorrel and affecting silage quality of cultivated plants by weed sorrels were investigated. It was detected that the feeding sorrel can be successfully ensiled under specific conditions even without any preservatives. The feeding sorrel silages can be used as feed for ruminants, or as a renewable energy resource for biogas production. A higher rate of weed sorrel species in perennial fodder crops or grasses can negatively affect nutritive value, palatability and quality of silage.