How to Get Rid of Fungus on Yucca Plants


Fungal growth on house plants is caused by improper watering methods, and promoted by inadequate lighting conditions. Powdery mildew is one of the most common fungi known to strike indoor specimens such as your yucca plant. You can effectively treat fungus with good common sense, and some simple everyday products that you already have around the house.

Step 1

Repot the infected yucca plant. Either sterilize the current container, or buy a new one. Pour about ½ inch of gravel or small pebbles into the bottom of the pot to improve drainage. Use a new package of sterile potting soil.

Step 2

Place the yucca in a well-ventilated spot with plenty of indirect light. Move it closer to the window for as much direct sun as it can tolerate. Improve air circulation by adding a fan to the sick yucca's room.

Step 3

Water your yucca just enough to evenly moisten the surface soil. Don't water it again until the surface feels completely dry.

Step 4

Remove the source of the infection by cutting off the affected leaf as well as all those near or below it. Trim dying leaves from the yucca as soon as you notice them. Always dispose of infected plant material -- don't add it to your compost heap.

Step 5

Combine equal parts milk and water. Wipe the affected plant's leaves with the solution, which will clean them of dirt, debris and fungus.

Step 6

Mix a 1/10 solution of mild hand dishwashing soap with water. Wipe the milk residue from the yucca plant's leaves with it. Follow with a clear water wipe, and then gently pat the leaves dry with a soft towel. Repeat steps 5 and 6 every two or three days for a week.

Things You'll Need

  • Pot
  • Gravel or pebbles
  • Sterile potting soil
  • Milk
  • Mild hand dishwashing soap
  • Soft towel


  • Do-It-Yourself: How to Remove Fungus from House Plants
  • Plant Care: Indoor Yucca Plant Care
  • Gardening Know How: Preventing Mold in House Plants

Who Can Help

  • Esprit de Isle: Common House Plant Diseases -- Plant Fungi
Keywords: fungus, house plant fungus, powdery mildew, how to get rid of fungus on yucca plants

About this Author

Axl J. Amistaadt began as a part-time amateur freelance writer in 1985, turned professional in 2005, and became a full-time writer in 2007. Amistaadt’s major focus is publishing material for GardenGuides. Areas of expertise include home gardening, horticulture, alternative and home remedies, pets, wildlife, handcrafts, cooking, and juvenile science experiments.