10' Green Giants watering requirements
I have recently acquired three 10' Green Giants which are planted on an approximately 10% slope in dark silty Missouri River dirt. They were planted so that the top of the root ball was level with the ground on the up hill side, but on the down hill side over half the root ball only has dirt mounded up against it... no moat. The hole dug for the root ball is not much larger than the root ball itself, as they dug it by hand. When they completed the planting I was told to water them when the were dry.
My questions to you are:
Were they planted correctly?
If not, should they be taken up and replanted properly?
Watering... I know the rule of two digits of the finger stuck in the soil for moisture check from reading a thread on Green Giants watering requirements. But,
Can I water all at one by using three soaker hoses (connected with water hoses between each soaker hose) to water them all at once?
If so, how long should the soaker hose (coiled around the trunk of each tree) be? 20' 25' 50' ?
How long should I keep this watering system going? One year? two? three?