How to Propagate swamp peppermint?
Propagate by seed at 13-18°C in spring and summer

swamp peppermint · Eucalyptus rodwayi
Grows best in full sun and a mildly acidic, neutral, or mildly alkaline soil that is moist but well-drained; but can also tolerate wetter soils better than many eucalypts. Able to withstand cold temperatures when mature, but shelter from cold, drying winds especially when young. See eucalyptus cultivation
Propagate by seed at 13-18°C in spring and summer