Purchase healthy yucca plants. Do not purchase a plant if the main plant stalk or cane wobbles in the dirt as this could show early signs of root rot. Avoid plants have a lot of yellow leaves.
Place yuccas in or near a south-, west- or east-facing window. Yuccas prefer light and will do better in these locations.
Allow the top half of the soil to dry before watering. Yuccas do not require a lot of water. Do not let the plant sit in water, which can cause mold and rot.
Spray yuccas with a mixture of one part liquid dish detergent and 3 parts water in the event of mealybugs or scale. This does not harm the plant. Normally insects do not attack yuccas.
Re-pot plants into one size larger pot as they outgrow their present pot. Yuccas do better when they are potted without a lot of space.