How to Treat Ash Trees


The tall ash tree is frequently used in furniture making. The tree generally grows to 50 to 80 feet tall and wide. The branches have many small leaves hanging from central stem. Millions of these trees have died in recent years due to a borer beetle. Keeping your ash tree healthy is the best way to fight off the possible invasion of these insects as well as other diseases and bugs.

Step 1

Plant ash trees in locations with full sun for best results and make sure the soil is well draining. Make sure there is enough space for a full-grown ash. They grow up to 80 feet tall and 60 feet wide.

Step 2

Add acidic fertilizer to the soil. Ash trees prefer acidic soil. Mix compost or organic material in with the soil when planting new trees if the soil is made of clay or sand. This will help with drainage and nutrient levels. Other things that might also help are leaves, pine needles and mulch, which break down adding nutrients to the soil and increasing its acidity.

Step 3

Keep mulch away from the ash's trunk to avoid mold problems.

Step 4

Fertilize the tree during the growing season, and water during periods of drought.

Step 5

Trim away dead branches near the trunk of the tree so that they won't cause future damage or injury. Trim diseased limbs about 1 foot from the disease to ensure that you got it all. Cut off one side of a fork if it develops in the top of the tree. This will keep it growing straight and prevent splitting due to weakness.

Step 6

Look for holes in the base of the tree and dead limbs. These are indications of boring insects. Insecticides can sometimes help with these insects, but not always. Consult with a tree expert to determine what kind of insect is taking up residence before proceeding.

Step 7

Cut out sacks of webs to prevent webworms from infesting the tree when they hatch.

Things You'll Need

  • Fertilizer
  • Mulch
  • Compost
  • Tree trimmer
  • Insecticides


  • Emerald Ash Borer: What Do You Do if Your Ash Tree is Infested with Emerald Ash Borer
  • University of Florida: White Ash
  • Empire National Nursery: Ash Trees for Home Garden Landscaping
Keywords: ash tree care, treat ash trees, care for ash