The rule of thumb for any plant is 1” of water per week. This can be from irrigation or rainfall. Each shrub and tree should be individually monitored until they become established. The best way to water is to set your hose at a slow trickle and place the hose by the base of the plant. The water should be at a slow enough rate that water is being absorbed into the soil and not running off. The goal is to slowly and deeply soak the plant. Overwatering can be just as much of a problem as under watering! A plant shows the same symptoms when it is being overwatered and under watered. The symptoms are usually yellowing and overall drooping of the leaves. So it is important to be checking whether your plant actually needs water. The way to do this is to physically check the soil about 4” deep near the root ball of the plant. If the soil feels to wet, do NOT water. But if it is dry, be sure to water. We encourage you to use a root stimulator with the initial watering to help encourage new root growth and lessen transplant shock to your plant. Tree Watering Table Size: Minutes at a Trickle: 1” 20 1.5” 25 2” 30 2.5” 40 Since you are watering deeply, you should only need to water 1-2 times per week until established. If it is exceptionally hot or windy, you may need to water more frequently. Shrubs will need about 10 minutes at a slow trickle, also only 1-2 times per week until established.