Use a spade or a trowel and dig a hole next to the edge of the root ball…not the edge of the planting area. This hole should be about 12 inches deep (from the tip on your middle finger to mid way between your wrist and elbow is about 12 inches). Reach your hand into the hole and feel how wet the ROOT BALL is. Grab some of the soil from the root ball and squeeze it. When you open your hand the soil, will either fall apart (dry) or stays in a clump (wet). If it falls apart, you need to water.