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"We are spikeless climbers"Spikes (climbing gaffs) are NEVER to be worn for tree access. Any monkey can spike up a tree. It takes time and skill to set a line on a safe branch union 75 feet up from the ground. Spikes are HARMFUL to the tree because the holes they gouge into soft tissue of the tree are perfect ports of entry for all kinds of wood boring insects and pathogens. They also give the climber a false sense of security. In the case of an emergency, climbing gaffs offer zero protection from a potentially deadly slide down the trunk. Our system allows us to be tied in and RESCUE READY from the time we leave the ground. This is handy in the case of a wasp attack or sudden bout of heat illness. We have never needed spikes to trim a tree and we have trimmed thousands of huge trees. We are proud to say that Arborvison is one of the only companies in the Valley that can offer spikless palm tree pruning (no bucket truck required).
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PRUNING
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Proper pruning should enhance a trees natural structure and promote growth. Practices such as topping (the indiscriminate cutting of branch ends to reduce a trees height or width) and loin tailing ( the stripping of interior growth within a tree) can sadly be seen just about anywhere trees and people coexist. Many of these trees can be restored while many more will die as a result of what may have been a home owners good intention to have their tree "trimmed". We strictly follow the ANSI300 standards for pruning and tree access. The following are acceptable types of pruning as stated in the A300.
CROWN
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This pruning includes the selective removal of dead, dying, diseased, crowded, weakly attached and low-vigor branches and water sprouts from a tree crown.
CROWN
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This pruning includes Crown Cleaning along with the selective removal of branches to increase light penetration and air movementinto the crown of a tree. Increased light and air stimulates and maintains interior foliage, which in turn improves branch taper and strength. Thinning reduces the wind-sail effect of the crown and the weight of heavy limbs. Thinning the crown can emphasize the structural beauty of trunk and branches as well as improve the growth of plants beneath the tree by increasing light penetration. When thinning the crown of a mature tree, seldom should more than one-third of the live foliage be removed. At least one-half of the foliage should be on branches that arise in the lower two-thirds of the tree. Likewise, when thinning laterals from a limb, an effort should be made to retain inner lateral branches and leave the same distribution of foliage along the branch. Trees and branches pruned in this manner will more evenly distribute stress throughout the tree.
CROWN
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This pruning reduces the height and/or spread of a tree. Thinning cuts are most effective in maintaining the structural integrity and natural form of a tree and delaying the time when it will need to be pruned again. The lateral to which a branch or trunk is cut back to should be at least one-half the diameter of the cut being made.
CROWN
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Improving the structure and appearance of trees that have been topped or severely pruned when heading cuts were made. One to three sprouts on main branch stubs should be selected to reform a more natural appearing crown. Selected vigorous sprouts may need to be thinned to a lateral or even headed to control length growth in order to ensure adequate attachment for the size of the sprout. Proper Crown Restoration may require several prunings over a number of years.
CROWN
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Removing the lower branches of a tree in order to provide clearance for buildings, vehicles, pedestrians, and vistas. It is important that a tree have a least one-half of its foliage on branches that originate in the lower two-thirds of its crown removed to ensure a well-formed, tapered structure and to uniformly distribute stress within the tree. When pruning for view clearance, it is preferable to develop "windows" through the foliage of the tree rather than to severely raise or reduce the crown.
