Tree Planting 2 – Staking and Guying
Transcription
Tree Planting 2 – Staking and Guying
Landscape | O n S i t e s Tree Planting 2 – Staking and Guying Objective: to demonstrate and ensure crew members have an understanding of why and how to stake a tree. Training Supplies: tree stakes or T-bars, wire, rubber or nylon tree straps, PVC pipe or high visibility tape, PPE. Lesson: Staking or guying newly-transplanted trees is necessary in sites that are exposed to high prevailing winds. Small trees (up to 2” in diameter) rarely require staking. Trees planted in very sandy or very wet clay soil should also be staked. Other reasons for staking include protection against vandalism, lawnmowers and other types of equipment. However, short stakes placed strategically around the tree can provide the same protection against mechanical damage from equipment, without the guy wires. Research has shown that unstaked trees had a greater trunk diameter than corresponding trees that were not staked. It is thought the subtle movement of the trunk in unstaked trees promotes the translocation of fluids up and down the trunk causing greater growth. stakes are placed in line with the prevailing wind direction and driven into undisturbed soil. Ties are attached to the tree, usually at the lowest branch. Larger trees are supported with guy wires. Guy wires are attached to three stakes driven 45 cm into undisturbed soil, with one stake placed in the direction of the prevailing wind. Ties are attached to the tree as high as is practical, with each attachment point 15 cm apart from each other. The axis of the stake should be at 90 degree angle to the axis on the pull of the guy wire. Install PVC pipe around guy wires for protection and visibility. If this is not possible, tie flags or tape to the wire so it is more visible. • Staking or guying newly-transplanted trees is necessary in sites that are exposed to high prevailing winds. • Guy wires and stakes and ties should always be removed after one growing season. Leaving them on will result in girdling of the trunk. If staking is necessary, follow the planting specification for number of stakes, the height of ties and stake and tie materials. Trees under 2.5 m tall can be supported by two stakes. The page 104 Canadian Nursery Landscape Association Are you certified? Notes: Sponsored by: page 105