Answer:
Apple trees.
Step-by-step explanation:
In Robert Frost's poem "Mending Wall" apple trees is what the narrator is growing on his land. Every spring the narrator and his neighbor get together to see where the wall needs to be repaired. The narrator is not sure about mending the wall and doubts about its utility. The neighbor answers to this with his father's words 'Good fences make good neighbors', and acts in consequence. He thinks that mending the wall is being practical.