Abstract: There is disclosed an apparatus (100) for irrigating and directing the growth of the roots of planted trees. In an embodiment, the apparatus is a generally hollow structure for encircling the roots of a planted tree, the structure having an enlarged base opening configured to allow the roots of the tree to grow downwardly, a narrower neck (108) opening configured to accommodate the trunk of the tree, and a wall (102) sloping from the enlarged base opening to a narrower wall top. An irrigation channel (110) integrally formed into the structure whereby, in use, the irrigation channel channels water around the structure to irrigate the roots of the planted tree. In an embodiment, the wall top defines a continuous shoulder (106) around the structure. An irrigation channel is formed between the continuous shoulder and the neck opening, whereby, in use, the irrigation channel channels water around the structure to irrigate the roots of the planted tree.