Landscaping & Nursery Information for Home Gardeners


Most ferns prefer a loose, organic soil; diffused or filtered light (north windows), high humidity and sufficient moisture to keep the soil from drying out. Excessive moisture can rot the plant. Dry conditions, such as those during winter when furnaces dry the air, can cause yellowing leaves and thinning of the plant.

Too much light can also cause plants to yellow and thin.


Rows of brown shell-like pustules on the underside of fern leaves, especially Boston and Maidenhair ferns, are spore casings and NOT insects. Do not remove.

The spores are an indication that the plant is growing ideally and is trying to propagate itself.

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