The final yield of Miscanthus cultivation is between 12 and 16 tonnes per hectare annually. This difference in yields are caused by plant density, emergence rate, soil type and climate, among other factors. The highest yields can be achieved in lower-lying soils with good water retention capacity. This due to the fact that Miscanthus is a C4 crop: high water availability (water retention capacity and high average rainfall) with high average temperatures have a conducive effect on crop growth!
In the establishment phase, yield increases annually to finally stabilise 3 years after planting. Crop growth in the first year after planting at about 1 - 2 tonnes per ha is not worth harvesting. It is not necessary to harvest the stalks, which may be left in the field until the following harvest season. Although it can also be chosen to chop the Miscanthus but leave it in the field as an organic weed suppressant. From the 2nd year after planting Miscanthus can be harvested annually. The tonnage in the 2nd year after planting is between 6 - 10 tonnes per hectare. From the 3rd year, the harvest is around 12- 16 tonnes per hectare.
Incidentally, there are Miscanthus giganteus fields in Europe that are more than 20 years old and still achieve stable tonnages.