Weed management in organic lemon balm farming was tested using the stale seed bed technique. Different levels of stale seedbed passes after autumn or spring ploughing were tried in field experiments. The number of stale seedbed passes did not increase weed emergence before sowing due to weather conditions. Only the last stale seedbed passes in later spring caused extra weed growth. However, intensifying the stale seedbed did not reduce weed density in lemon balm after sowing. Autumn ploughing followed by superficial incorporation of catch crop resulted in lower weed emergence compared to complete residue incorporation by spring ploughing. The overall weed reduction effect of the tillage treatments was low, likely due to high weed pressure on the organic farm. Proper soil moisture and temperature are crucial for the stale seed bed technique to be effective.