Yucca plants thrive in hot and dry climates where other plants may not do as well. Some yucca varieties grow as a trunk-less shrub while others may produce trunks trunks that reach over 10 feet high. Yucca have long, sword-like leaves that are upright near the center then droop around the outer edges. They produce a flower stalk in summer that is adorned with blooms. The flowers are usually white but may have a slight pink or yellow tint. Trimming yucca keeps the plant looking its best year around.
Cut off the flower stalk after the blooms have withered. Trim it off at the base. The stalk emerges from the center of the plant, so you'll need a ladder for pruning tree-type yucca.
Trim off the dead and yellowing leaves around the base of the plant during spring. Using sharp shears, cut off these leaves at the base of the plant where the leaves emerge from the soil or trunk.
Examine the leaves throughout summer and fall for damaged or dying leaves. Cut off these leaves at the base. Keep in mind that the leaf edges on some varieties produce hair-like strands that are acceptable and do not indicate damage.