Best time to plant Japanese Holly and Thuja? Home › Forums › Tree & Shrub Questions › Tree & Shrub Questions › Best time to plant Japanese Holly and Thuja? This topic contains 0 replies, has 1 voice, and was last updated by Anonymous 8 years, 4 months ago. Viewing 1 post (of 1 total) Author Posts July 30, 2008 at 10:29 am #28286 Anonymous I do a lot of planting in early to mid-fall, especially when it’s container material that is already in a pot at the nursery (not being field-dug at that time). Go for it. Make sure the plants are well-watered and go into winter in that condition. Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic.