The answer to 'how to install shrub' is to first prepare the planting area by digging a hole that is 2-3 times wider than the shrub's root ball and only as deep as the root ball. Carefully remove the shrub from its container, loosen the roots if they are compacted, and place it in the hole. Fill the hole with the original soil, tamping it down gently to remove air pockets. Water the shrub thoroughly after planting to help it establish. Finally, add a 2-3 inch layer of mulch around the base of the shrub, being careful not to let the mulch touch the trunk.
Proper planting and care is essential for the long-term health and growth of your new shrub. Avoid planting too deeply or in poorly draining soil, which can lead to root rot. Monitor the soil moisture and water as needed, especially during the first year after planting.