I ordered a 120 Canadian hemlock trees they came in bags bair root we planted them the same day they arrived on a drip line around the 1st of May it still cool and rainy in Colorado but the next day after planting they started losing needles and now they have none all of them . They are still pliable will they come back around ? And I can’t figure what I did wrong? They were about 6″ trees any thoughts or advice would be appreciated.
Planting stress may have caused initial needle drop.
Watering is key; daily for the first 2 weeks.
Continue watering and they likely will green up next spring.