Tree Planting
noun, verbal noun
If you plant wood you are doing tree planting, since only trees are made of wood.
しょくじゅ
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
結婚の記念として、主人と私はメープルシュガーの木を植樹しました。
My husband and I planted a sugar maple to commemorate our marriage.