Primary propagation of bromes is via seed sowing, preferably in well-draining soil, with optimal light exposure and at temperatures conducive to germination. Soil moisture should be consistent without causing waterlogging. Some species can be propagated through division or cuttings. Propagation difficulty is generally low; however, the timing of sowing and soil conditions are crucial. To propagate, collect ripe seeds, sow them shallowly in prepared soil beds or trays, lightly cover with soil, keep moist until germination, and thin seedlings as necessary. Transplant successful seedlings to their final growing location after the risk of frost has passed.