Saplings are planted at a high density, as much as 15,000 per hectare for willow and 12,000 per hectare for poplar. Willow SRC can be established according to two different layouts. In most North European countries (Sweden, UK, Denmark) and in the US, the most frequent planting scheme is the double row design with 0.75 m distance between the double rows and 1.5 m to the next double row, and a distance between plants ranging from 1 m to 0.4 m, corresponding to an initial planting density of 10,000 - 25,000 plants ha−1. In other countries like Canada, a single row design ranging from 0.33 m between plants on a row and 1.5 m between rows (20,000 plants ha-1) to 0.30 m on the row and 1.80 m between rows (18,000 plants ha-1) is more common.