The answer to 'how to install tree' is to properly prepare the planting site, dig the hole, plant the tree, and provide proper care and maintenance. First, select a suitable tree species that will thrive in your local climate and soil conditions. Choose a location with adequate space for the tree's mature size and avoid areas with underground utilities or overhead power lines. Prepare the planting site by digging a hole that is 2-3 times the width of the root ball but no deeper. Loosen the soil around the sides of the hole to allow for easy root growth. Carefully place the tree in the hole, ensuring it is straight and at the same depth it was growing in the nursery. Backfill with the original soil, gently tamping it down to remove air pockets. Water the tree thoroughly, and apply a 2-4 inch layer of mulch around the base, keeping it a few inches away from the trunk.
Proper tree installation and aftercare is crucial for the tree's long-term health and success. Monitor the tree's water needs and adjust as necessary, especially during the first year. Prune any damaged or crossing branches, and stake the tree if needed to provide additional support. If you're unsure about any step in the process, it's best to consult with a professional arborist or certified landscaper for guidance.