The "installer" is telling you to water WAY TOO MUCH unless you are on a gravel pile or complete sand. And if you are on slow draining clay, your new trees would die very quickly from such treatment. What's more, the "installer" (aka monkey with a shovel) giving you these instructions STRONGLY suggest, they have no clue as to what they are doing. So I bet your trees are improperly planted, and that must be fixed ASAP. Take some pics of your plants, the planting site, close up of the trunks as they enter the ground, and any other info you can provide. i.e Are they container plants? What's your soil like? Does your soil drain? What area are you located? Are they planted with new construction? etc. All this is critical info we need to be able to help you and your new trees.

Arktrees

i would suggest.. no matter teh suggestion..

that if he is warrantying it..

then you do what he says ...

but insert finger.. and find out.. and tell us if it actually dries in between waterings

ken

"Are they container plants?"

>> They are trees that were in burlap sacks

"What's your soil like?"

>> For the Crabapple, it is your standard dirt. I know that might not be too helpful, but it's not too sandy, not too clayey, not too rocky, etc. Top is loamy. For the other two, it's primarily just straight up loam.

"Does your soil drain?"

>> Yes. Not too slow, not too quick. With the mulch bed there it puddles though, but does drain slowly.

"What area are you located?"

>> Massachusetts

"Are they planted with new construction?"

>> No but the two that are in loam, are in it because I raised the lawn in that area.

Is there a chance that these were actually swimming pool installers masquerading as nursery workers? I agree 100% with Arktrees; they are telling you to water WAY TOO MUCH unless you are on a gravel pile or complete sand.

Below is a link, that you might want to review, about planting trees and shrubs. Compare the link to what your "installers" did, if you can.

Here is a link that might be useful: Planting a Tree or Shrub

Ok, no problem. I'm just gonna switch to the treegator watering bag then. I see it being used by commercial and government sites all over.

Thanks

The tree gators do work well as long as you fill them up routinely. Have seen them used on smaller (under 2") tree to good effect.
These are pretty big trees that were planted. They should be getting 3.5 X 10 gal/inch diameter=35 gallons each watering. Does your proposed tree gators hold at least that much water?
I would recommend every other day watering for 6 weeks after planting before going to once a week watering down here in Z8.
Temps are between 60-80 F on average each day down here.
Adjust for your climate.