Plant asparagus ferns in pots or containers in loose, well-drained potting soil. Outdoors, plant it in rich, well-drained soil that is slightly acidic. It is generally tolerant of less-than-ideal soil conditions, and can tolerate drying out to an extent.
Keeping an asparagus fern hydrated takes a little effort, and this plant thrives on humidity. Indoor growing conditions can often be dry, especially due to winter heat. Mist the plant daily, focusing on the arching stems. If the plant appears to be turning brown and droopy, it likely needs more water. While the asparagus fern can dry out to the point of appearing dead, it likely isn't. Warmer, humid air, and daily misting will help revive it. Outdoors, keep asparagus fern well-watered to prevent the soil from completely drying out.
Although most fern varieties are non-toxic to cats and dogs, Asparagus Fern is not actually a fern, and is toxic to pets.