Most ash trees are used as street or lawn trees so they do tolerate growing near other plants. Most like regular watering (such as they would get when the lawn is watered), but established trees can get by with very little supplemental water. You can plant most any annual or perennial under ash trees, but expect some invasion of tree roots in your planting bed; all the moisture and food you provide to the annuals and perennials will be irresistable to the tree's roots! |