How to Fix Leggy Asparagus Ferns

Place asparagus ferns where they get morning sun and afternoon shade. This encourages compact growth. Place indoor plants in an area with bright, indirect light. Too little light causes the plants to stretch toward the nearest light source, resulting in leggy growth.

Maintain temperatures above 50 degrees Fahrenheit indoors. Outdoors, plant asparagus ferns only in a frost-free climate. Low temperatures can cause parts to die or weaken the plant so it grows poorly.

Water outdoor asparagus ferns about once a week, supplying enough to moisten the top 6 inches of soil. Spread a 2-inch layer of mulch over the soil to conserve the moisture. Water potted ferns when the surface of the soil dries. Consistent soil moisture results in fuller, more compact growth because the plant doesn't grow weakly from drought stress.

Pinch back the tip of each stem when the plant is actively growing during spring and summer. Grasp the stem tip between your thumb and forefinger and remove 1 to 1 1/2 inches from the tip. Pinching encourages compact growth and prevents the stems from becoming too long.

Cut out old stems in spring with a pair of clean shears. Remove dead, damaged, or overgrown and weak stems at their base. Asparagus ferns tolerate heavy pruning as long as you leave some young, healthy stems on the plant.