Get yourself a Good BackPack Waterer...

They Use them for Spraying weeds.
I have Mine In the ground and Providing you give them a Good Soak every second day theyll Be fine..
It Really depends on how good the Drainage is of the soil.
You dont want water sitting in the bottom Of the Hole Because that will Create Root Rot.
I Give Mine about 4 ltrs Of water (In the afternoons).
every second day.