How to Grow Green Ash Trees


Green ash trees grow very quickly. Hardy in USDA zones 2 to 9, they do well over a large part of the United States, according to the Arbor Day Foundation. Green ash trees are useful as shade trees. A tree can grow to 50 or 60 feet, with a spread of 25 feet.

Step 1

Plant your green ash tree in full sun. Green ash trees can tolerate almost any soil--acidic, alkaline, loamy, moist, sandy, well drained or wet, according to the Arbor Day Foundation. Dig a hole as deep as the root ball and two times as wide. Place the tree in the hole and fill the hole with soil. Build a 4-inch-high barrier around the tree about a foot from the trunk. Fill it with mulch, and water it until it reaches the top of the barrier. Keep the soil around the tree moist at all times while it is getting established.

Step 2

Water the green ash tree well. It is not very drought tolerant, and in areas with little rainfall it needs to be watered for 15 minutes once a week.

Step 3

Prune the tree in the spring, after it starts to sprout leaves. Remove any broken, diseased or dead branches at the base of the tree. Prune any crossing or vertical branches, as well. A good green ash tree should be shaped with a strong central leader. All other branches around it should be pruned.

Step 4

Fertilize the green ash tree once a year in the spring with a 10-10-10 water-soluble fertilizer.

Tips and Warnings

  • Green ash trees are susceptible to the emerald ash borer, ash yellow and verticillium wilt.

Things You'll Need

  • Shovel
  • Pruning shears
  • 10-10-10 fertilizer


  • Arbor Day: Green Ash
  • Empire National Nursery: Ash Trees for Home Garden Landscaping
  • Save a Tree: Ash Tree
  • Texas A&M: Planting a Tree

Who Can Help

  • Tree Help: Green Ash
Keywords: green ash trees, growing green ash, grow green ash

About this Author

Hollan Johnson is a freelance writer for many online publications including Garden Guides and eHow. She is also a contributing editor for Brighthub. She has been writing freelance since 2008 and her interests are travel, gardening, sewing, and Mac computers. Prior to freelance writing, Johnson taught English in Japan. Johnson has a Bachelor of Arts in linguistics from the University of Las Vegas, Nevada.