Maintaining a Tree's Grow Space

Maintaining a tree's grow space is vital to the development of trees and the longevity of a healthy urban forest. In general, grow space is considered 4-5' from the base of the tree.

Below is a list of the dos and don'ts of maintaining proper grow space:

• Do not crowd out the tree's root system by over planting within the dripline of the tree.
• Do not let any ivy or vines grow on the trunk or up into the canopy of a tree, as this will "shade out" the sunlight from reaching the trees' leaves, thus reducing the ability to make food while weaken the tree and eventually killing it.
• Do not hang or attach any items to a city tree (swings, ropes, lights, etc.) as items like these are often forgotten about and the tree will continue to grow around these items causing future damage and/or eventual decline of the tree.
• Reframe from using non-weed barrier solid plastic sheeting/rocks/concrete or any other non-permeable material as "mulch" over the trees' root system so as not to impend the movement of air/water and to reduce the effects of excessive radiant heat.
• Ideally, apply 2 to 4 inches of mulch, made from plant matter. This will add nutrients to the soil as it decomposes. Mulch should be placed near, but not touching the trunk and extend to the dripline (furthest extent of the branches). If you can't mulch the full distance, go as far from the trunk as possible while maintaining the landscape character.
• Remove turf 3-5' from the base of the tree for less root competition, water competition, and nutrient competition, while also allowing for a protection zone from mechanical damage (lawn mowers, weed eaters, etc.).

For more tree tips, visit www.ci.claremont.ca.us/trees or email [email protected].