Why Are Ferns Able to Grow 20 Meters Tall?

Soil

• Tree ferns grow best is loamy, slightly acidic soils that are loose and well-drained. Although the tree fern thrives best in moist environments, saturated soils are counteractive to its growth and should be avoided. Tree fern roots prefer cool soil environments, so it is best to plant the tree fern in a cool, shaded location.

Climate

• Along with a cool and shaded soil environment, the tree fern demands cool, humid temperatures for healthy development. This tropical tree enjoys temperatures that average between 60 and 70 degrees Fahrenheit with high humidity levels, according to the University of Georgia Cooperative Extension. The tree fern is intolerant to cold temperatures, as well as to excessively hot, dry conditions.

Fertilizer

• The tree fern has a slow growth rate and will take many years to reach heights of 65 feet. Regular feedings with a slow-release fertilizer promote increased vigor while replenishing the tree fern’s nutrients. Always use a well-balanced fertilizer designed for ferns and apply according to the directions to prevent injuring the tree fern.

Care

• The healthy tree fern requires very little pruning and maintenance. Damaged and ailing fronds should be removed from the tree fern as they appear. Always use sharp, sterile pruning shears to make the cuts. Keep the tree fern’s soil environment moist but never saturated or dry. Mites, mealy bugs and other feeding insects are common predators of the tree fern. To maintain healthy development, it is important to inspect the tree fern’s fronds and planting area regularly and treat infestations immediately. The insecticides should be applied thoroughly and according to instructions to ensure that all fronds are covered.