Lady Ferns prefer a cool and humid environment, with temperatures ranging from 50-70°F (10-21°C) and humidity levels between 60-80%. To achieve this, place the fern in a room with good ventilation and mist the foliage regularly or use a humidifier to maintain the appropriate humidity levels. To lower the temperature, place the plant in a cooler area or near an air conditioning unit, but avoid placing it in a draft.