In nature these conditions are ideally provided by bushland, rainforests and near streams and waterfalls where the humidity is high. In cultivation most ferns will grow best where there is protection form hot sun and strong winds and where there is plenty of moisture. Dappled light created by a tree canopy or shrubs is ideal, but these conditions can be reproduced artificially by shadehouses, verandahs, or even the shadowy protection of buildings, fences or boulders. Soil should be able to absorb moisture, but drain well. If your soil is dry and sandy then digging in lots of compost and peat will help.
Ferns appreciate and abundant supply of water, especially over the dry summer months.
Pests and Diseases Fortunately ferns are not affected by many pests or diseases. Healthy, vigorously growing ferns are able to withstand attacks from pests much more than weak sickly plants. If a fern is constantly affected by pests there may be underlying causes such as poor drainage, overcrowding, lack of air circulation, poor nutrition, lack of water or it may be in a position too exposed to the elements. Fungicidal sprays should only be used as a last resort. There are many hardy ferns that will tolerate being grown in pots indoors.