It is always good to water your newly planted tree for first 30 days, but once you cut back to a normal 2 times a week watering regimen your new tree is not completely home free.
It takes approximately one year for your freshly planted tree and root system to get acclimated to its new surroundings and soil. So, in that time frame, please be sure to give its necessary TLC (i.e. water and fertilizer)
Landscape shrubs & palms: Water for 20-30 minutes every day for the first 30 days.
After first 30 days, cut back to 30 minutes per day 2 times a week for next 2 weeks.
From there on out, watering once or twice (*depending on season) a week for 30 minutes is recommended.
Trees: Water for 20-30 minutes every day for the first 45 days. After first 45 days, cut back to 30 minutes per day 2 x a week for next 2 weeks.
From there on out, watering twice (*depending on the season) a week for 30 minutes is recommended for the next full year.