As often as it needs it :-) Sorry......that is not intended to be facetious but it is nearly impossible to be more precise about watering frequencies. Specific soil conditions and fluctuations in weather will dictate.

When you do water, you want it to be slow and thorough, like with the hose on a slow trickle and the water penetrating down the full depth of the rootball. You may have to do some testing to determine how long that takes for your watering method.

After a pretty wet start to the year, the Puget Sound area has experienced abnormally warm and dry weather for the last three months. I would be very attentive to watering needs for any new plantings right now!!

need a pic... ken

A lot of conifers brown in full sun for the first year or so until they build big enough root systems. Per advice above, yours looks like it will be fine once it settles in.

insert finger 2 inches into soil .. and do not water again.. until the soil is warm.. or drying out ... and heck.. from what i know of seattle.. that might be next year.. lol ... same with a sunburn theory .. lol

a lot of these small plants are grown in greenhouses ... one of the few conifers that can be rooted ...and when you buy them.. you should HARDEN THEM OFF .. to sunshine ....

in the greenhouse.. they were misted.. perfect water.. peerfect humidity.. etc ... and we dont know how it ended up at your supplier.. etc ...

so next time ... slowly introduce it to your ambient surroundings.. before you go slapping it in the ground.. and MAYBE this would be avoided ...

see link below about watering ...

my bottom line.. minor damage.. for a possible multitude of reasons.. and nothing to lose sleep over.. but dont try to kill it with too much water love ...

ken

https://sites.google.com/site/tnarboretum/Home/planting-a-tree-or-shrub

Ken, these are offered by the scazillions in retail nurseries here and they are out in full-on, all day sun. No greenhouse, no misting - full exposure to the elements. They require no 'hardening off' (and I think you might really mean 'acclimation' :-))

And with our weather recently, these should be checked daily for watering needs!!!

With such a small rootball it can dry out fast in our dry summers. Pay close attention to it's water needs for the next few months.

I've raised several hundred from cuttings and grew them up to a good size. Once established in decent ground they don't need to be watered in the summer here, ......although they appreciate it. One of my favorite plants.