How can you promote growth on an half dead oak tree?

To promote growth on a half-dead oak tree, start by assessing its health and identifying any dead or diseased branches, which should be pruned to encourage new growth. Ensure the tree receives adequate water, especially during dry spells, and consider applying a slow-release fertilizer to provide essential nutrients. Additionally, mulch around the base can help retain moisture and suppress weeds. Finally, monitor for pests and diseases, treating any issues promptly to support the tree's recovery.