Co-Dominant Stems on White Spruce Sapling (When is best to remove?)

[lrk1993]

Last April, I planted about 100 2-year old conifer saplings. At planting, I noticed this white spruce had co-dominant stems, but decided not to prune it, wanting to avoid causing issues its first year in the ground.

The question now is, when will be best to prune this co-dominant stem while ensuring the greatest chance of success for the tree?

I'm located in Central Iowa.

 

[BeatCJ]

Do it right now.

For branch removal, early spring.

For shaping, early summer/late spring

 

[pdqdl]

What he said. ↑

Use sharp hand pruners. No hatchets or saws of any kind.

 

[BeatCJ]

When I worked at a Christmas tree farm, the shearing knives drew blood when you looked at them. I'm pretty sure my razor isn't as sharp.