When to repot an acre recently bought

Question

The acer is in a pot and will remain a container tree but is it better to leave it in the shop provided container until the spring or repot it now in a slightly bigger pot with 50% ericaceous and 50% tree compost ?

Answer 1

Unless you think it has been in the existing container for a long time and is root bound or showed signs of nutrient deficiency when it was in leaf, I would wait until spring.