We have transplanted a 10-12 foot tall Dogwood tree from the woods on our property to our front lawn. We want to know what fertilizer we should apply, how much to apply, and how often to repeat the applications. The diameter of the trunk is 3-4 inches. Marriottsville, Md.
In general the best time to transplant a dogwood is in the spring. The tree that you moved is large and the root system may take a while to establish itself. Trees grown in the wild have been grown in an understory environment and had some protection from the wind in a shaded protected area. It will not like an open exposed area.
It is important for the tree to establish a root system and put out new roots. At this point, make sure the tree is not planted too deeply. Make sure mulch is no thicker than several inches and keep away from the base of the trunk. Keep the tree well watered up until the ground freezes. Check soil moisture at least once a week. Dogwoods are understory trees and grow best in morning sun and afternoon shade. They will require more moisture if you planted in full sun. You will have to water during dry periods next season. See our website on the planting process and transplanting https://extension.umd.edu/hgic/trees-and-shrubs/planting-process
A reason to fertilize is if there are nutrient deficiencies or growth is lagging. The only way to know is by testing your soil. Results give pH and nutrient deficiencies.
Do not over fertilize as this can make the tree susceptible to sucking insects. Also, if your lawn is fertilized the tree will benefit from that http://extension.umd.edu/hgic/soils/soil-testing
Here is a publication on fertilizing trees and shrubs http://extension.umd.edu/sites/default/files/_images/programs/hgic/Publications/HG23%20Fertilizing%2...