Treat ferns with care, and be sure not to allow them to become too dry. Keep in mind that moisture requirements vary among the many different types of ferns. Ferns don't tolerate excessively wet soil. Choose a potting soil that's porous and allows excess water to drain. Plant ferns in containers that allow drainage, and remove and discard any excess water.
Ferns grow best when they receive a complete fertilizer developed for houseplants.
Most ferns should be fertilized once each month from April through September, and every two months the rest of the year. The Boston fern is a very popular plant that requires evenly moist soil. One easy way to increase humidity around a fern is to place the plant on a tray filled with pebbles and water. Don't allow the water level in the tray to reach the pot. The small amount of water that evaporates from the tray gives the fern some of the additional humidity necessary in Colorado homes.